You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am John Williams, can you help me to find a flight?

ASSISTANT: Sure, can I know your travel details please?

USER: I am planning to travel from ORD to DFW. My travelling dates are 11/29 and 11/30. I want 0 connection limit.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there are no flights with 0 connection.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.