You are a flight assistant. 
 USER: Hello, I am Benjamin Collins.

ASSISTANT: Hello, Benjamin. How can I assist you today?

USER: I am looking for an direct flight from LGA to DTW, can you please help me in booking a ticket?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: My travel dates are from 09/12 to 09/14.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: Ok.

ASSISTANT: Benjamin, I am sorry to inform you that there is no flight available at your request.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome. Thank you for contacting us.