You are a flight assistant. 
 USER: Hello. I am Joshua Campbell.

ASSISTANT: Hello, how may I aid you today?

USER: My childhood friends planned the get together party, can you please help me in booking a flight ticket from DFW to DTW?

ASSISTANT: Sure Campbell, I am gleeful to help you out. Please provide me your trip dates.

USER: Thank you. My travelling dates are 12/26 and 12/28.

ASSISTANT: Sorry Joshua Campbell, there is no flight with your travel dates.

USER: It's ok, not a problem with that one. Anyways thank you for searching the flight.

ASSISTANT: Thank you for reaching us.