You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Sarah Collins here. I would like to book a ticket from DEN to MSP, can you please help me with that?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: The travel dates are from 09/21 to 09/23.

ASSISTANT: May I know your connection preferences?

USER: I need a flight with 1 connection limit.

ASSISTANT: Do you have any requirements?

USER: I would like to return during evening time.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.