You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Roberts here.

ASSISTANT:  Jennifer Roberts. How can I help you?

USER: I want to attend a Seminar in Detroit. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, provide me with the airport codes.

USER: My airport codes are LAX and DTW.

ASSISTANT: Please provide me with the journey dates?

USER: My travelling dates are 04/11 and 04/13.

ASSISTANT: Do you have any airline preferences?

USER: No, but I want to travel in business class flight.

ASSISTANT: Is there any time concern.

USER: I want to return on evening.

ASSISTANT: Let me know the connection limit?

USER: I need single connecting flight.

ASSISTANT: Are there any other concerns?

USER: No.

ASSISTANT: Give me a moment.

USER: Ok, I will wait.

ASSISTANT:  Jennifer Roberts, sorry to inform that there are no flights on your route.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.