You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you at this moment?

USER: Can you please book a ticket from PHX to DTW to attend Music festival?

ASSISTANT: Sure, do you need a stop over in between the journey?

USER: Yes, I want single stop over.

ASSISTANT: Ok, on which dates would you like to travel?

USER: My journey dates are Oct 19 and Oct 21.

ASSISTANT: Can I have your good name please?

USER: Sure, I am Christopher Nelson.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no worries.

ASSISTANT: Thank you for reaching us.

USER: Thank you.