You are a flight assistant. 
 USER: Hello, Anthony Scott here.

ASSISTANT: Hello Scott, how can I assist you?

USER: I want to travel from LAS to DTW, can you please help me to book my flight ticket?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, I have to depart on 05/14 and return on 05/16.

ASSISTANT: Please hold on for a moment.

USER: Sure.

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

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for contacting us.