You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Pamela Harris. I need to book a direct flight to Austin AUS, can you help me with booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 01/05 to 01/07.

ASSISTANT: Let me know your source code.

USER: My source code is PHL.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: There is no flight found matching with your requirements.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you.