You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Barbara Carter, I want to book a flight on 05/02 to visit my home at San Francisco. Can you book a flight with in fare of 500?

ASSISTANT: Sure, I am glad to help you. May I know your boarding and landing airport codes?

USER: I will fly from Washington DC-IAD and destination is CA-SFO.

ASSISTANT: Ok, when you planned to return?

USER: I plan to return on 05/04.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is an UA airways with 1008 number and the fare is 100 that exactly fits your schedule. Shall I proceed?

USER: Please proceed with booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for availing us.