You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Williams.

ASSISTANT: How can I help you williams?

USER: I would like to travel to MSP on 11/30 to do a research on plants, can you find a flight for me?

ASSISTANT: Sure, I am here to help you. May I know your source and return date?

USER: My current location is OAK and book the return ticket on 12/02. I need a direct flight in my journey, make sure of that.

ASSISTANT: Sure, wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to tell that there is a connecting flight which matches your requirements. Shall I proceed?

USER: No, please don't book it.

ASSISTANT: Ok,thank you for approaching us.

USER: Thank you for your quick response in searching.