You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a ticket for round trip to Washington to attend my meeting, can you please help me in reservation?

ASSISTANT: Sure, may I know your journey dates?

USER: My depart is on 12/16 and arrival is on  12/18.

ASSISTANT: Please share me your airport code.

USER: My source and destination is at DC-DCA.

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

USER: I need a halt in between my journey.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Ok.

ASSISTANT: We are glad to say that, we found an airline: AA, flight number: 1011 and price is 100.

USER: You can proceed with booking.

ASSISTANT: May I know your good name?

USER: I am Sharon Thomas.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.