You are a flight assistant. 
 USER: Hello, I am Lisa Hill.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a ticket from DFW to LGA, can you please help me in booking a flight ticket?

ASSISTANT: Sure, May I know your journey dates?

USER: My journey dates are 05/19 to 05/21.

ASSISTANT: Is there any more specifications do you need?

USER: My price limit is 500 and it should be single connection.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a Delta airlines, but it is a direct flight. Shall I proceed for booking?

USER: No, I am in need if an connecting flight. Thank you for your information.

ASSISTANT: Thank you for choosing us.