You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Michelle Hill. Please reserve a flight ticket from ORD to MSP as my meeting purpose.

ASSISTANT: Sure, let me know your preferred journey dates.

USER: I have planned to travel on 10/16 and 10/18.

ASSISTANT: Ok, may I know your connection limit?

USER: I prefer direct flight.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that, there were no flights found based on your specified details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.