You are a flight assistant. 
 USER: Hello, I am Benjamin Phillips.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please assist me in booking a direct flight to LAS from DEN?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book your ticket?

USER: My travel dates are from 10/13 to 10/15.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.