You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Pamela Thompson. I am planning to take my children's to Denver Zoo at Denver, could you please help me in booking a flight ticket?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, I want to fly on 10/23 and return on 10/25.

ASSISTANT: Please let me know your airport codes.

USER: My airport codes are NC - CLT and CO - DEN.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. We found a UA airline, flight number:1023 and the price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.