You are a flight assistant. 
 USER: Hello,. I am Charles Roberts.

ASSISTANT: Hello, how can I assist you today?

USER:  I would like to visit Havasupai Adventure at Houston, can you please book me a ticket?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER:  I need to leave from my nearest airport OAK to reach HOU.

ASSISTANT: Can you please share your planned travel dates?

USER: I want to travel on 12/02, and need to catch return flight on 12/04.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found a AA airline, flight number: 1001, price: 100 with one connection.

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been confirmed in business class.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.