You are a flight assistant. 
 USER: Hello, I am Jessica Lopez.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to start my trip on 10/23 and return back on 10/25. Can you book a ticket for me?

ASSISTANT: Sure, may I know your airport codes please?

USER: Search for the flights flying from ORD to DCA.

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 AA airline and it costs you 100.

USER: Sure.

ASSISTANT: Shall I proceed? Your ticket has been booked with 1000 flight number.

USER: Thank you for reserving my seat.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.