You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Jerry Smith. I want to book a ticket from PHL to LAS to meet my uncle, can you help me in booking?

ASSISTANT: Sure, could you please mention your travelling dates to search for the flight?

USER: I am departing on 11/15 and return on 11/17.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: That's ok, thank you for your information.

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