You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I am planning to book a flight ticket to DTW from PHX, can you please help me out?

ASSISTANT: Sure, please share me when you planned to travel?

USER: Sure, my planned travelling dates are Dec 21 and Dec 23.

ASSISTANT: Do you want a connecting flight for this journey?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Is there any other requirement related to booking?

USER: No.

ASSISTANT: May I know your good name?

USER: Sure, my name is Mark Roberts.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.