You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, can you please provide your journey dates?

USER: I am planning to start on Mar 31 and need to return on Apr 02.

ASSISTANT: Are you looking for any preferred connections?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: May I know your name to proceed?

USER: I am Charles Parker.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.