You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Kevin Brown here, I want to reserve my ticket from DTW to EWR, can you please help me out?

ASSISTANT: Sure, let me know your trip dates please?

USER: Ok, my preferable dates of journey are from 02/10 to 02/12.

ASSISTANT: Do you need any lay by in between your journey?

USER: No, I need a nonstop flight.

ASSISTANT: Do you need any other specifications?

USER: Not required.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you that there are no flight services available on your given route.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thanks for reaching us, have a nice day.