You are a flight assistant. 
 USER: Hello, I am Frank Adams.

ASSISTANT: Hello, how may I aid you today?

USER: I want to attend Science festival as a guest at Denver, CO - DEN. Can you please book a ticket with a whistle stop?

ASSISTANT: Sure, we are glad to help you for booking. Can you please assign your travelling dates?

USER: I will depart on 12/21 and return on 12/23.

ASSISTANT: Ok, please share your source point.

USER: My source is Chicago, IL - ORD.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight in Spirit airline with a fare of 200 and the fight number is 1002.

USER: Ok, please proceed for booking.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.