You are a flight assistant. 
 USER: Hello. I am Patricia Johnson.

ASSISTANT: Hello, how may I assist you from my end?

USER: I want to book a ticket from DTW to BOS to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am mirthful to help you out. Please share me your trip dates.

USER: I am departing on 10/10 and return on 10/12.

ASSISTANT: Sorry Patricia Johnson, there is no flight in your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, have a safe flight.