You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Green.

ASSISTANT: What kind of help are you looking for?

USER: I would like to attend the celebrations of food festival at Austin, AUS. Can you help me in booking a flight ticket with fare 200?

ASSISTANT: Sure, when are you planning to travel?

USER: I am planning to travel on 08/09. My return will be on 08/11.

ASSISTANT: May I know your source point?

USER: My take off airport code is Houston, HOU.

ASSISTANT: Thank you for waiting, there are no flights found with the given details.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, hope we serve you next time.