You are a flight assistant. 
 USER: Hello. I am Donna Walker.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend a conference meeting at Charlotte, NC-CLT, So can you please help me in booking a flight ticket from PA-PHL?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Could you please share your planned trip dates?

USER: My travelling dates are from 12/09 to 12/11.

ASSISTANT: Do you prefer either connecting or direct flight?

USER: I need a way station in between journey.

ASSISTANT: How much can you afford for flight ticket?

USER: I can afford only 500 for a ticket.

ASSISTANT: We found a flight with airline AA of fare 1300. Can I proceed?

USER: Usually, I can proceed with that. But, my company has provided me the price limit of 500. So,please do not proceed. Thank you.

ASSISTANT: Thank you for opting us.