You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Lewis.

ASSISTANT: Brian Lewis, how can I aid you today?

USER: I have to attend a Live Concert at Phoenix, could you please help me with booking a flight ticket from DTW to PHX?

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

USER: I would like to depart on Apr 16th and return on Apr 18th.

ASSISTANT: Ok, do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: And make sure that my return time must be afternoon. Sure, take your time.

ASSISTANT: Sorry Brian Lewis, there are no flights available on your requested dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.