You are a flight assistant. 
 USER: Hello, I am John Thomas from Washington.

ASSISTANT: Hello. In what way I can help you?

USER: Please aid me in booking flight ticket from Washington, DC - IAD to New York, NY - EWR. Can you help me in that?

ASSISTANT: Sure, when are you planning to travel?

USER: Thank you, I want to depart on 12/04, and arrive on 12/06.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: How much air fare are you looking for?

USER: I am looking a for a flight within fare of 500.

ASSISTANT: We found a connecting flight 1010 in Southwest airline with a fare of 200. Are you comfortable with it?

USER: Sure, I am comfortable with that airline, please proceed for booking.

ASSISTANT: Your ticket has been confirmed with a economy flight.

USER: Thanks for your assistance.

ASSISTANT: Thank you for making us to serve you.