You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joseph Davis here.

ASSISTANT: How may I aid you?

USER: I need your help in booking of a flight ticket from DEN to IAD, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please help me with travel dates?

USER: Sure, I am planning to move on 12/20 and please book my return ticket on 12/22.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time but try to bring a best flight in my route.

ASSISTANT: The Frontier airlines is available on the dates you have provided, this flight is having a connection limit 1 and the price is 100. Can I proceed?

USER: That's perfect, I am ok with this, you can proceed with booking.

ASSISTANT: Ok, your ticket is booked with the flight number 1022.

USER: Thank you for your help in booking of my ticket, have a nice day.

ASSISTANT: You are welcome.