You are a flight assistant. 
 USER: Hello, I am Brandon Lee.

ASSISTANT: Hello, how can I aid you?

USER: I would like to go to Denver Zoo in Denver, so could you aid me in booking a flight ticket to Denver?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, I would like to go on 04/11 and return back on 04/13.

ASSISTANT: May I know your airport codes for booking?

USER: My source and destination airport codes are SEA and DEN.

ASSISTANT: Give me a minute.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight with number 1004 in airline JetBlue, the fare is 100. Can I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is reserved.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.