You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to fly from LAS to DTW. Can you check the flight availability on that route?

ASSISTANT: Sure, please share me your trip dates.

USER: My planned travel dates are 06/25 and 06/27.

ASSISTANT: May I know your class preferences?

USER: No issues, with my class, my return time should be in morning time only.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Sure, David Harris here.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I want a flight with single connection.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.