You are a flight assistant. 
 USER: Thomas Scott here.

ASSISTANT: Hello, how may I serve you?

USER: I want to meet my friend in Philadelphia, so please book me a ticket from LGA to PHL.

ASSISTANT: Can I know your dates please?

USER: The travel dates are from 09/13 to 09/15.

ASSISTANT: Hold on for a while please.

USER: Ok.

ASSISTANT: Sorry, there is no flights available on this route.

USER: That's fine, thank you for helping me.

ASSISTANT: Thank you for reaching us.