You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please reserve me a flight ticket from DCA to SFO?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you.

ASSISTANT: Can I know your name please?

USER: My trip dates are May 13 and May 15. I am Raymond King.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1000.

USER: Thank you.

ASSISTANT: Thank you for reaching us.