You are a flight assistant. 
 USER: Hello. My name is Robert Moore.

ASSISTANT: Hello, what type of help you are looking from our service?

USER: I have to book a flight ticket for me from IAD to submit my documents in DEN where my college is locating?

ASSISTANT: Sure, may I know your planned dates of trip?

USER: My dates are on 11/13 and arrival back on 11/15.

ASSISTANT: Spirit airline is having a flight with a fare of 100 with a single halt in between the journey. Would you like to book this flight ticket?

USER: Yes, please confirm my ticket booking.

ASSISTANT: Your flight ticket has been confirmed with flight 1004.

USER: Ok, thank you for your help in ticket booking.

ASSISTANT: Thank you for opting our service, have a safe journey.