You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Dorothy Collins, want to travel from DEN to MSP. Can you please help me?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: My trip dates are from 04/13 to 04/15.

ASSISTANT: Please help me with your preferred depart and arrival time.

USER: My return time is afternoon.

ASSISTANT: Do you need a direct or connecting flight?

USER: I want a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Dorothy Collins, I am really sorry to inform you that there is no flight to book your ticket.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us. Have a great time.