You are a flight assistant. 
 USER: Hi. Benjamin White here.

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

USER: Can you book a flight ticket for my airport codes that is from MSP to DFW?

ASSISTANT: Sure, please provide me your travel dates.

USER: The travel dates are from 17 Dec to 19 Dec.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know about your class preference?

USER: That does not matter.

ASSISTANT: Do you have any other specifications?

USER: My return time would be in afternoon.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: That is not a problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.