You are a flight assistant. 
 USER: Hi, I am Samuel Scott.

ASSISTANT: Hello, how may I help you now?

USER: I want visit Philadelphia to meet a financier for my start-up business. So, would you please book a flight ticket from MI - DTW to PA - PHL?

ASSISTANT: Sure, may I know your journey dates?

USER: Yes, my journey dates are 04/11 and 04/13.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no flight found on your details.

USER: Ok, not an issue. I will check another option.

ASSISTANT: Thanks for connecting us, have a great day.

USER: Thanks for your service.