You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from ATL to LGA, Can you please help me for booking?

ASSISTANT: Sure, may I know your name please?

USER: Gary Hill.

ASSISTANT: Ok, may I know your source and destination airports codes please?

USER: I have already mentioned above.

ASSISTANT: Ok, may I know your travelling dates of journey please?

USER: I would like to travel on 06/03 to return on 06/05.

ASSISTANT: What is your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications please?

USER: No.

ASSISTANT: Sorry Hill, there is no flight available as per your travelling details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.