You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from DEN to IAD?

ASSISTANT: Sure, may I know your trip dates please?

USER: Thank you.  I have planned my travel dates as Apr 16 and Apr 18.

ASSISTANT: Do you have any other requirements?

USER: No, I do not have any more specifications.

ASSISTANT: Can I know your name please?

USER: Sure, myself Robert Martin.

ASSISTANT: Please wait for some while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in Frontier airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: That is fine, please proceed with booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Most welcome.