You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Sandra Martinez here. I want to travel from Las Vegas to Detroit for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are from 03/04 to 03/06. Make sure my connections limit is 0.

ASSISTANT: Can you please share your source and destination airport codes?

USER: My airport codes are from LAS to DTW.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome.