You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how may I help you today?

USER: Please book me a ticket with price under 500.

ASSISTANT: Sure, do you need any halt in between journey?

USER: Yes, I need 1 break in between.

ASSISTANT: May I know your travelling dates?

USER: I would start on 09/09 and return on 09/11.

ASSISTANT: Please share me your airport codes?

USER: I want to go to the Independence hall in Philadelphia, PA - PHL from Detroit, MI - DTW.

ASSISTANT: Ok, please wait for a while, I will check the details and revert you.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight found on single connection limit.

USER: That's Ok. Thanks for your help.

ASSISTANT: Thanks for reaching us and have a nice day.