You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Clark.

ASSISTANT: Linda, how may I aid you?

USER: I would like to book a ticket from PHX to IAH, can you please help me out?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I am travelling on these dates 12/12 and 12/14.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Sorry Linda, no flight is available on your route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.