You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How best can I help you at this moment?

USER: Can you please help me to book a ticket from ATL to MSP?

ASSISTANT: Sure, may I know your dates of journey?

USER: My travelling dates are on Jan 18 and Jan 20.

ASSISTANT: Do you have any limit on maximum number of connections?

USER: I need a single connecting flight.

ASSISTANT: Let me know your class preference for your journey.

USER: I am okay with any class.

ASSISTANT: Do you have any airline preference for the trip?

USER: No.

ASSISTANT: Let me know your departure and arrival timings.

USER: I am okay to travel at any time.

ASSISTANT: Can I know your name to proceed further for documentation purpose?

USER: Sure, I am Paul Clark.

ASSISTANT: We regret to say that, there are no flights found on your desired routes.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.