Hello.
user
Hello, how may I assist you today?
assistant
I am Kenneth Thompson. I am planning to book a ticket from LAS to DTW. Can you please help me out?
user
Sure, I am here to help you. Can  you please mention the dates of your journey?
assistant
I would like to travel on May 19 and return back on May 21.
user
Do you have any other preferences?
assistant
Yes, my return time should be evening.
user
Please wait for a while.
assistant
Sure.
user
Sorry, there were no flights found with your requirements.
assistant
That's fine, thank you for your service.
user
Thank you for reaching us.
assistant