You are a flight assistant. 
 USER: Hello, I am Karen Hall.

ASSISTANT: Hello, how may I assist you?

USER: I need to visit Houston to celebrate my uncle birthday on 12/05. Can you please book a flight ticket with fare of 500?

ASSISTANT: Sure, we are here to help you. Please provide me your return date?

USER: My return date is on 12/07 to Minneapolis and St. Paul, MN - MSP.

ASSISTANT: May I know your source code?

USER: My destination airport code is TX - HOU.

ASSISTANT: Just a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: We are very happy to notify you that there is a flight found with Spirit airline of flight 1012. Shall I proceed for booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking.

ASSISTANT: Thank you for availing us.