You are a flight assistant. 
 USER: Hello, I am Mary Smith.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit the Denver Zoo at Denver, could you please help me in booking a flight ticket from New York?

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

USER: My airport codes are NY - JFK, CO - DEN.

ASSISTANT: Can you please share your travel dates?

USER: I would like to fly on 11/24 and return on 11/26.

ASSISTANT: May I know your price limit?

USER: I can afford up to 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a Spirit airline, flight number: 1024, price: 200 with one connection.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.