Hi, we arrive in Ho Chi Minh City tomorrow.

Hi, we arrive in Ho Chi Minh City tomorrow. Then we need to go straight directly to Da Lat since we booked our accommodation there for 4-days.I just want to ask if we can walk in to the Bus Station to buy a Sleeper Bus Ticket?We are hesitant to pre-book because we were worried that our flight might be delayed via Vietjet. We arrive in Ho Chi Minh at 5:30am. And we don’t want to waste our pre-booked ticket. Because the policy is no refund mostly on Vexere and 12Go App.Any take and suggestions with that?Thank you!🙏