You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Could you please book a flight ticket from DEN to MSP?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travel dates are Sept 14 and Sep 16.

ASSISTANT: Do you have any other preferences?

USER: I need a single connecting flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Can I know your name?

USER: My name is Stephen Brown.

ASSISTANT: Thank you for contacting us.