You are a flight assistant. 
 USER: Hello, I am Dorothy King.

ASSISTANT: Hello, how may I help you?

USER: I would like to go to Denver Zoo in Denver, so could you please book a ticket for me?

ASSISTANT: Can I have your travelling dates?

USER: I would like to go on 03/20 and return back on 03/22.

ASSISTANT: Please send your nearby airport codes.

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

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a flight available with Spirit airlines. Shall I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done with flight number 1024. Thank you for reaching us.

USER: Thank you.

ASSISTANT: Welcome.