You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Charles Hernandez. I planned to attend for a wedding in DEN, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, I am glad to help you with that. May I know your travelling dates to proceed further?

USER: I prefer to travel on 10/20 and 10/22.

ASSISTANT: Ok, please wait for a while, let me check for the availability of flights.

USER: Sure.

ASSISTANT: Spirit airlines is providing you a connecting flight with a fare of 100, shall I proceed with booking?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket is confirmed with the flight number 1005.

USER: Thank you.

ASSISTANT: Welcome, have a great day.