You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Young.

ASSISTANT: Young, how may I render you?

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

ASSISTANT: Please provide your itinerary dates.

USER: I am travelling on these dates 08/16 and 08/18.

ASSISTANT: Please wait for a while.

USER: Sure.

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

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

ASSISTANT: Thank you for reaching us.