You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Can you help me to book flight ticket from ORD to MSP?

ASSISTANT: Sure, I am happy to help you with that. Please, share me your travel dates.

USER: My travel dates are July 27 and July 29.

ASSISTANT: Do you have any connection limit for your journey?

USER: I need a connecting flight.

ASSISTANT: Let me know your class preference, please.

USER: I prefer business class to travel.

ASSISTANT: May I know your airline preference, please?

USER: I am comfortable with any airline.

ASSISTANT: May I know your depart and arrival timings?

USER: I do not have any particular timings.

ASSISTANT: Please, provide me your name to proceed further.

USER: Anna Baker here.

ASSISTANT: Sorry for the inconvenience, there are no flights running on your desired routes.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us, have a good day.