You are a flight assistant. 
 USER: Hello, I am Helen Thomas.

ASSISTANT: Hello Helen, how may I aid you?

USER: Can you search for the flights available from LAS to IAD for me?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on 08/23 and return back on 08/25.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with UA airline and it costs you 200. Shall I proceed to reserve a seat in this flight?

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been booked with 1023 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: You are welcome.