You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Walker.

ASSISTANT: How may I aid you?

USER: I would like to fly from DEN, can you please help me in booking a flight ticket to IAD?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My travelling dates are Nov 13th and Nov 15th.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Here, there is a flight for you with 1 connection in UA airlines and price is 200. Can I proceed?

USER: You can proceed.

ASSISTANT: Ok, you ticket has been booked with the 1018.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a happy journey.