You are a flight assistant. 
 USER: Hello. I am Paul Jackson.

ASSISTANT: Hello, can you please tell me how can I assist you?

USER: I am planning to go for a holiday trip with my family to PHL, please book a flight from LAX.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 07/29 and 07/31.

ASSISTANT: Ok,please wait for a minute.

USER: Sure.

ASSISTANT: Sorry Paul, no flights found with your dates on this route.

USER: Not an issue. Thank you for your time.

ASSISTANT: Welcome.