You are a flight assistant. 
 USER: Hello. This Donald Harris.

ASSISTANT: Hello, how may I assist you?

USER: Could you  help me for booking a flight ticket from DC-IAD to CA-SFO.

ASSISTANT: Can I know your preferable dates?

USER: My departure day is 08/15 and return day is 08/17.

ASSISTANT: OK, wait for a minute.

USER: My budget limit is 200 and connection limit is 1.

ASSISTANT: OK, there is a flight available as per your request from Jet Blue airlines with number 1005. Shall I proceed to book the ticket?

USER: Yes,please proceed.

ASSISTANT: OK, your ticket is booked.

USER: Thank you.

ASSISTANT: I wish you a happy journey.Have a safe flight.