You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Thank you. I have planned my travel dates as Dec 14 and Dec 16.

ASSISTANT: Is there any class preference for you?

USER: I would prefer economy class to travel.

ASSISTANT: Do you have any other specifications?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Your good name please.

USER: Sure, myself Daniel Martin.

ASSISTANT: We found an airline: Frontier, flight number: 1000 and price is 200 with one connection.

USER: That is fine, please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.