You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I respond to your request?

USER: Can you book a direct flight to Austin, AUS?

ASSISTANT: Sure, we are here to help you for booking.

USER: Thank you.

ASSISTANT: Let me know your source point.

USER: I am boarding at LGA.

ASSISTANT: Ok, can you please assign your journey dates?

USER: My journey dates are from 08/02 to 08/04.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting our agency, have a nice day. May I know your name?

USER: My name is Sandra Mitchell.

ASSISTANT: Thanks for providing your name.