The Boeing Starliner capsule's return to Earth has been delayed indefinitely and there is no date set for return.On Wednesday, the two astronauts, Butch Wilmore and Suni Williams, gave an update for the International Space Station in addition to NASA and Boeing crews on Earth.Wilmore and Williams expressed their confidence in Boeing's ability to get them home despite being in space longer than scheduled."I feel confident that if we had to, if there was a problem with the International Space Station, we could get in our spacecraft, and we could undock, talk to our team, and figure out the best way to come home," Williams said in a press conference on Wednesday.The two NASA astronauts lifted off on June 5 from Cape Canaveral Space Force Station in Florida and docked with the ISS on June 6.The pair were initially expected to spend one week aboard the ISS evaluating the spacecraft and its systems and return June 14. However, an ongoing helium leak and misbehaving thrusters have delayed their return."We're really working to try and follow the data and see when is the earliest that we could target for undock and landing. I think some of the data suggests optimistically, maybe it's by the end of July, but we'll just follow the data each step at a time and then at the right time figure out when the right undock opportunity is," Steve Stitch, NASA's commercial crew program manager, said. A big topic of discussion on Wednesday was about the batteries aboard the Starliner. Ahead of the launch, Boeing said they were good for 45 days but has since indicated they would perform well past that deadline.Stitch said, optimistically, their hope is to get them home by the end of July.NASA and Boeing say right now, they are not exploring the idea of possibly using another spacecraft to get them home."Our prime option is to return Butch and Suni on Starliner. We've declared Starliner safe to be an emergency return vehicle. In fact, we actually had the crew get in it a week or so ago when we had the breakup and power up Starliner in the event they had to leave the station," Stitch said.Wilmore and Williams are set to give another update from the ISS before undocking and returning home.No date has been set for their return.