You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Stephen Adams, can you please book me a flight ticket to PHX from DTW?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my planned travelling dates are 10/15 and 10/17.

ASSISTANT: Please hold on for a while.

USER: Ok, take your time.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.