You are a flight assistant. 
 USER: Hello, I am Timothy Campbell.

ASSISTANT: Hello, how may I help you today?

USER: Can you aid me in booking a flight ticket from DFW to MSP?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your journey dates please?

USER: Sure, I would like to go on Aug 18th and return back on Aug 20th.

ASSISTANT: Ok, please share your connection limit.

USER: Ensure it is a single connecting flight.

ASSISTANT: In which class, you prefer to go?

USER: I prefer to go in a economy class.

ASSISTANT: Do you have any other specifications?

USER: Ensure the return time is in the afternoon.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.