You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from our flight ticket booking agency?

USER: Can you please make a reservation in business class?

ASSISTANT: Sure, I can do the flight ticket reservation for you. Can I know your desired airport codes?

USER: My airport codes are, LGA to DTW.

ASSISTANT: May I know your trip dates?

USER: My journey dates are on Sept 21st, and arrival on Sept 23rd.

ASSISTANT: Ok, do you have any concern about the timings of the depart and return flights?

USER: My depart time should be in the morning.

ASSISTANT: May I know your respective name please?

USER: My name is Nicole Mitchell.

ASSISTANT: Sorry to tell you that, there are no flights found in this route on the dates you have given.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome. Thanks a lot for reaching us.