You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Michelle Hall.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, may I know when you are planning to make your journey?

USER: Sure, my planned travel dates are Nov 19 and Nov 21.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need to return my journey for the evening flight with 1 connection.

ASSISTANT: We are sorry to inform you that there is no flight found with your matching information.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.