You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Kathleen Lee. I need to book a flight ticket from Chicago to explore the global culture in Philadelphia. Will you please help me for getting a flight ticket?

ASSISTANT: Sure, can you please share your travelling dates? Ok, do you need any halt in between journey?

USER: My departure date is 11/18 and arrival date is 11/20. I need a halt.

ASSISTANT: May I know your price limit?

USER: Price limit is below 5000.

ASSISTANT: Can I have your airport locations?

USER: My airport locations are from IL-ORD to PA-PHL.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, unfortunately no flights found on that route.

USER: Ok, no issue.

ASSISTANT: Thank you for availing us.

USER: Thank you for your kind help.