You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Smith.

ASSISTANT: How can I assist you?

USER: I am going to Houston, TX-HOU to purchase a vintage car from a dealer. Can you hold me a ticket?

ASSISTANT: Sure, may I know your source airport code please?

USER: My source airport code is Atlanta, GA-ATL.

ASSISTANT: Please provide the travel dates.

USER: My travelling dates are from 11/24 to 11/26.

ASSISTANT: Frontier airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked with flight-1002, have a safe journey.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.