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

ASSISTANT: Hello, How can I assist you?

USER: I want to attend Culture, heritage and folk festivals at Philadelphia, can you help me to book a connecting flight?

ASSISTANT: Sure, I will help you with that. Is there any price limit?

USER: The price should not exceed 5000.

ASSISTANT: Could you please share your planned dates?

USER: I want to fly on 11/12 and return on 11/14.

ASSISTANT: Do you have any connection limit?

USER: My source is at Dallas & Fort Worth, TX - DFW.

ASSISTANT: Can you please provide me your Destination airport code?

USER: My destination is at PA - PHL.

ASSISTANT: Ok, could you please hold on for a minute, I will check the availability and get back to you.

USER: OK.

ASSISTANT: Sorry for the inconvenience, we are unable to find a connected flight on your preferred details.

USER: Ok, not a problem. Please terminate the booking. Thanks for your kind service.

ASSISTANT: Thank you for approaching us, Have a fantastic day.