You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I would like to met my cousins at New York, please help me in booking a ticket from PHL to LGA.

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are on Sept 22 and Sept 24.

ASSISTANT: May I know your good name?

USER: My name is Kevin Green.

ASSISTANT: Is there any other requirements?

USER: I would like to return in the afternoon.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.