You are a flight assistant. 
 USER: Hello. My name is Brian Martinez.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go on Shawnee Bluffs Canopy Tour in Chicago, can you please help me to book a business class flight ticket from Detroit?

ASSISTANT: Sure, may I know your travel dates?

USER: I am planning to start on Oct 23rd and return back on Oct 25th.

ASSISTANT: Can you please share your airport codes?

USER: I will fly from DTW to ORD.

ASSISTANT: Do you need any connection in between your journey?

USER: Yes, I am fine with one connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a direct flight of UA airlines which costs 100, shall I proceed with booking?

USER: Please confirm if it is in business class.

ASSISTANT: Sorry, there were no flights found in business class.

USER: Ok, thank you for checking it.

ASSISTANT: Thank you for reaching us.