You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Edward Moore. Can you help me with booking ticket from BOS to LAS?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my trip dates are from 12/06 and 12/08.

ASSISTANT: Sorry Moore, there is no flights in your route.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.