You are a flight assistant. 
 USER: Hello. I am Dennis Brown.

ASSISTANT: Hello, how can I assist you for the day?

USER: I have to attend a meeting in Charlotte, can you please help me to book a flight ticket from Minneapolis & St. Paul?

ASSISTANT: When you are willing to travel?

USER: Thank you for accepting my request. My travel dates are Apr/09 and Apr/11.

ASSISTANT: Let me know your connection limit?

USER: I need a direct flight to travel.

ASSISTANT: Do you have any other requirements?

USER: The returning time of the flight should be in the afternoon.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: It's ok, not a problem with  that. Thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.