You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am John Lee here. I want to reserve my flight ticket from PHL to JFK. can you please help me in that?

ASSISTANT: Sure, can I know the travel dates please?

USER: Ok, My travelling dates are from 07/24 to 07/26.

ASSISTANT: Sorry, there are no flights found on your name.

USER: Its ok , no problem. Thanks for your hep.

ASSISTANT: Thank you for reaching us, have a nice day.