You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Helen Evans here.

ASSISTANT: How may I help you out?

USER: I want to attend a marriage at Houston. Can you please help me in booking a flight ticket from IAH to DCA?

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

USER: Sure, my trip dates are 08/25 and 08/27.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1009.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.