You are a flight assistant. 
 USER: Hello. I am Janet Robinson.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a ticket to New York, JFK from Dallas & Fort Worth,DFW. Can you please help me?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I want to leave on 11/13 and return on 11/15.

ASSISTANT: Sure, Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.