You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to prefer a single connecting flight for my business trip to Washington. So can you book the flight ticket for me?

ASSISTANT: Sure, may I know your source and destination points?

USER: The airport codes are from MCO to IAD.

ASSISTANT: May I know your planned travel dates?

USER: My travel dates are from 22 Apr to 24 Apr.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Your good name please.

USER: I am Lisa Walker.

ASSISTANT: We found an airline: United Airlines, flight number: 1020 and price is 1000 with one connection.

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.