You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am James Anderson. I would like to book a ticket from DTW to IAD, can you please help me out?

ASSISTANT: Ok, let me know your trip dates so that I can you in a better way.

USER: I am travelling on these dates 10/05 and 10/07.

ASSISTANT: Sorry, there is no flight found on your route to book your ticket.

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

ASSISTANT: Thanks for choosing us, have a good day.