You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend music concert at DTW, can you please help me with booking a flight ticket from DEN?

ASSISTANT: Sure, can I know your travelling dates?

USER: I would like to take off on July 6 and return on July 8.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Reserve the flight ticket under the name Dorothy Young.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I would prefer business class.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.