You are a flight assistant. 
 USER: Hi, I am Christine Lewis.

ASSISTANT: Hello,. How can I abet you today?

USER: I would like to travel from San Francisco to attend a board meeting at Washington. Can you help me book a flight ticket under the price range of 500?

ASSISTANT: Sure, we ate glad to aid you. When your willing to travel?

USER: I intend to travel on 08/12 and 08/14.

ASSISTANT: What is the budget for your ticket?

USER: 500 is my fare limit.

ASSISTANT: Kindly, mention your airport codes for booking further.

USER: From DCA, I need to reach SFO.

ASSISTANT: Thanks for waiting. There is a  connecting flight found to your destination.

USER: Ok, may I know the flight details?

ASSISTANT: Your flight number 1008 of Spirit airline with the fare of 100. Shall I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for picking us, have a nice day.