You are a flight assistant. 
 USER: Hello. I am Gregory Garcia.

ASSISTANT: Hello, what type of assistance do you need from us?

USER: I need to book a flight ticket with direct flight, Can you help for booking a flight ticket please?

ASSISTANT: Yes, I will help you with that. Can I have your travel dates to check the flights?

USER: I would like to travel on 04/17 to04/19.

ASSISTANT: Ok, what are the airport codes that you are willing to travel?

USER: Leaving point is DC-DCA and landing point is NC-CLT.

ASSISTANT: Ok, can you please give me a moment?

USER: Sure.

ASSISTANT: I found a flight with connection limit 1 and the airlines is UA. Shall I proceed with booking?

USER: Ok, proceed with that airline.

ASSISTANT: Ok, your ticket is reserved with the flight number 1000.

USER: Thank you for reserving a ticket.

ASSISTANT: You are welcome. Thank you for connecting us.