You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Turner from Detroit.

ASSISTANT: How may I assist you now?

USER: I want to attend my brother in law memorial service at SEA. Can you please help me to book a flight from DTW?

ASSISTANT: Ok, may I know your desired dates for this journey?

USER: Sure, I would like to star my journey on July 26 and need to end on July 28.

ASSISTANT: Do you need a direct flight?

USER: No, I need a connecting flight. I need business class ticket.

ASSISTANT: Sorry to say, there is no flight booking available with business class.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing our services.

USER: Thank you for the information.

ASSISTANT: Most welcome.