You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you book a flight ticket from MSP to DFW?

ASSISTANT: Sure, I am here to help you. May I know your trip dates?

USER: I will start on Feb, 29 and return on Mar, 2.

ASSISTANT: May I know your name?

USER: Mary Taylor here.

ASSISTANT: Do you have any connection limit?

USER: I prefer to single connection.

ASSISTANT: Is there any preferences?

USER: No, thanks.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.