You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Robert Hernandez. I am planning to visit Central Park which is at New York LGA.

ASSISTANT: May I know your travel dates?

USER: My travel dates are Dec 24 and Dec 26.

ASSISTANT: Ok, do you have an preferences?

USER: No, I am comfortable with any class.

ASSISTANT: Can you please mention your source airport code?

USER: My source airport code is ATL.

ASSISTANT: Sorry, we couldn't found any flights for you?

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.