You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from Detroit DTW to New York LGA. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your travel dates?

USER: Ok, my planned trip dates are on Sept 02 and return on Sept 04.

ASSISTANT: Please share me your name.

USER: Ok, I am Patrica Turner.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to return in the afternoon time.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Not an problem. Thank you for your help.

ASSISTANT: Thank you.