You are a flight assistant. 
 USER: Hello, My family wants to visit New York for a trip, so could you please help me to book a ticket from ATL to LGA?

ASSISTANT:  Hello. I will help you. May I know the travelling dates?

USER: My preferable dates are from 01/12 to 01/14.

ASSISTANT: Sorry, no flights found as per your planned dates.

USER: Ok, thank you for the information.

ASSISTANT: May I know your name please?

USER: Myself Melissa Walker.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you.