You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Alexander Robinson here.

ASSISTANT: How can I help you?

USER: Please book a ticket from HOU to DCA, for attending a function in my aunt's home.

ASSISTANT: Yes, can I know your travelling dates?

USER: Sure, my trip dates should be 08/11 and 08/13.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found a flight ticket with a price of 200 and 1 connecting flight.

USER: Please proceed.

ASSISTANT: Ok, your ticket is booked.

USER: Thanks for your help.