You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Please book a ticket to Chicago, ORD from Washington, DCA.

ASSISTANT: Ok, please share your travel dates?

USER: I want to travel on 01/27 and return on 01/29.

ASSISTANT: May I know your name please?

USER: My name is William Evans.

ASSISTANT: We found a flight in Frontier airline with a fare of 500 is available for you. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Ok, your booking has been confirmed with 1022 flight.

USER: Thank you for the help.

ASSISTANT: Thanks for approaching us, have a safe journey.