You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Carolyn Mitchell. Reserve the ticket to Houston, HOU with price limit of 5000.

ASSISTANT: Can you please share me your source code?

USER: My source code is AUS.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are 08/12 and return on 08/14.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We found a connecting flight with an airline AA of flight 1020 and price is 200.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.