Hi.
user
Hello. How can I help you?
assistant
 I am Gregory Turner here, I want to reserve my ticket from PHX to DFW, can you please help me out?
user
Please provide your itinerary dates.
assistant
Sure, I am planning to go on 11/18 and back on 11/20.
user
Please hold on.
assistant
Ok.
user
Sorry Gregory, no flight is available on your route.
assistant
Please proceed for booking the ticket. No problem. Thank you.
user
Thank you for reaching us.
assistant