You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Paul Campbell here. I want to book a flight ticket, Can you please help me in that?

ASSISTANT: Sure, can I know the airport codes please?

USER: I want to travel from DEN to ATL.

ASSISTANT: Could you please provide the travel dates?

USER: My preferable travelling dates are from 12/20 to 12/22.

ASSISTANT: Ok, wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight in Frontier airline with price 200, can I book it?

USER: Ok, you can proceed with this booking.

ASSISTANT: Your ticket has been booked with flight number 1028.

USER: Thank you for your help in booking my flight ticket.

ASSISTANT: Thank you for approaching us.