You are a flight assistant. 
 USER: Hello. Michael Moore here.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking my flight ticket from LGA to visit DTW, as I have conduct a science fare there?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travel dates?

USER: Sure, my planned travel dates are July 15th and 17th.

ASSISTANT: Ok, please wait for a while.

USER: Ok, sure.

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

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: You are welcome and thank you for choosing us.