You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I serve you?

USER: I am Benjamin Hill. I would like to take my children to Austin Children's Museum at Austin, AUS. Please book a flight ticket under price 500.

ASSISTANT: Sure, May I know the source code?

USER: My source code is HOU.

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates are from 11/10 to 11/12.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT:  Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport. Thank you for opting us.

USER: No issues, thanks for the response.