You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a flight from DFW to PHL, can you help me?

ASSISTANT: May I know your trip dates?

USER: I want to fly on 31 Oct and return on 02 Nov.

ASSISTANT: Is there any connecting limit preferences for your travel?

USER: I prefer for connecting flight to travel.

ASSISTANT: May I know your name please?

USER: I am Karen White.

ASSISTANT: No flights found as per your preferences at the moment.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.