You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to travel to Detroit for visiting purpose.I need to book a flight ticket.

ASSISTANT: Sure, Can you please provide your airport codes and source?

USER: Sure, I want to travel from NY-EWR on 07/07 to MI-DTW on 07/09.

ASSISTANT: Ok, Please wait for a while, I will check the availability of flight and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting. May I know your name?

USER: My name is Joseph Robinson.

ASSISTANT: Ok. Unfortunately, we did not find any flights based on your given details.

USER: Thanks for your information.

ASSISTANT: Thank you for contacting us.