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

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: Nice. Please end your dates of journey.

USER: I would like to go on 01/18 and return back on 01/20.

ASSISTANT: Sure. Please share your nearby airport codes.

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

ASSISTANT: There is a flight available with Spirit airline having 1 stop. Shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1004. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.