You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, let me know your name please.

USER: I am Robert Scott.

ASSISTANT: Ok, how can I help you today?

USER: I want to book a flight ticket from MI-DTW to attend a business trip on 05/08.

ASSISTANT: When do you plan to return on?

USER: 05/10 is my return date.

ASSISTANT: To where you want to travel?

USER: I need to reach DC-DCA.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: Thank you for being patient. We found no flight matching with your specifications.

USER: No issue.

ASSISTANT: Thank you for reaching us and have a nice day.

USER: Thank you for your help.