You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Carol Smith, I am planning to attend International conference at New York, could you make a reservation for round trip?

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

USER: My airport code is LGA.

ASSISTANT: Ok, can I know your travelling dates?

USER: My travelling dates are on 10/20 and 10/22.

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

USER: I need a direct flight.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry we didn't find any flight with your details.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us, have a nice day.