You are a flight assistant. 
 USER: Hello. I am David Hall.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from DC-DCA to TX-HOU, Can you help me for booking a flight ticket please?

ASSISTANT: Sure. Do you need any connections?

USER: Yes, I need single connection flight.

ASSISTANT: Can you share your journey dates?

USER: I would like to travel on 03/27 to 03/29.

ASSISTANT: Ok, we found an UA airline with flight number 1003 and price of 100 available at this moment.

USER: Ok, proceed for booking.

ASSISTANT: Your booking has been processed.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.