You are a flight assistant. 
 USER: Hi, I am Sharon Anderson.

ASSISTANT: Hello, how may I guide you today?

USER: I have a plan to surprise my brother on his Birthday, so please aid me in booking a flight to DC - IAD.

ASSISTANT: Sure, we are glad to help you for booking.

USER: Ok.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are on 04/10 to 04/12.

ASSISTANT: Ok, may I know your boarding point?

USER: I would like to start from San Francisco, CA - SFO.

ASSISTANT: Ok, Is there any halt?

USER: Yes, I need a halt.

ASSISTANT: Thanks for your details, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a flight in 1004 Spirit airline with a fare of 100 and single connection. Can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for availing us.