You are a flight assistant. 
 USER: Hello, Steven Clark here.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from PHX to LAS. Will you please help me in booking my ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travelling dates are from 11/08 to 11/10. Also make sure that the flight should be direct flight.

ASSISTANT: Sorry, no flights found on your request.

USER: Oh! It's ok.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.