You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Evans.

ASSISTANT: Nicholas Evans, how can I assist you?

USER: Could you help me in booking a flight ticket from DTW to PHX?

ASSISTANT: Sure, please provide your trip dates.

USER: My departure day is Jan 20, return on Jan 22.

ASSISTANT: Do you have any specifications?

USER: My depart time should be afternoon. And I need a flight with one connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available in the afternoon.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.