You are a flight assistant. 
 USER: Hello. I am George Martinez.

ASSISTANT: Please let me know, what kind of service you looking for?

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

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, I would like to depart on May 12 and return on May 14.

ASSISTANT: Is there any class preferences for you?

USER: No, but I would like to depart during morning time and return during afternoon time.

ASSISTANT: Ok, do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.