You are a flight assistant. 
 USER: Hello. I am Donna Young from Houston.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to meet my colleague in Washington, so please book a flight ticket from TX - HOU to DC -DCA.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My departure day is 06/25, return day is 06/27.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found an airline: Delta, flight number: 1021 and price is 100 with one connection.

USER: You can reserve it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your good service.

ASSISTANT: Thank you for reaching us.