You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Clark.

ASSISTANT: Clark, how can I assist you today?

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

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

USER: I am departing on 11/25 and return on 11/27.

ASSISTANT: Ok, let me check for the available flights.

USER: Ok.

ASSISTANT: Sorry Clark, there are no flights available on your preferred dates.

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

ASSISTANT: Thank you for contacting us and have a nice day.