You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Charles Green.

ASSISTANT: How may I guide you?

USER: I would like to meet my sister on her birthday, could you please help me to book my flight ticket from DCA to SFO?

ASSISTANT: Charles, I am willing to help you with this. Can you please mention your journey dates?

USER: Sure, I will depart on 02/04 and return on 02/06.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: As per your criteria, there is a flight with Southwest airlines and the ticket figure is 200. Shall I proceed for this?

USER: Sounds perfect! You can proceed for booking the ticket.

ASSISTANT: Charles, your ticket is reserved in economy class with the flight-1012.

USER: Thank you very much for helping me.

ASSISTANT: Thank you Charles for reaching our agency.