You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please make a reservation with the name of Gregory Clark from PHX.

ASSISTANT: Sure, please provide your terminus airport code.

USER: Destination airport code is LAS.

ASSISTANT: May I know your itinerary dates?

USER: I want to travel on May 16 and return back on May 18.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Gregory Clark, no flights are available on your route.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.