You are a flight assistant. 
 USER: Hi, I am Lisa Williams.

ASSISTANT: Hello. How can I serve you?

USER: I want to exhibit my paintings at Bishop arts in Dallas & Fort Worth. Please book me a ticket with price under 500.

ASSISTANT: Ok, Can you please share your travelling dates?

USER: I would start on 10/23 and return on 10/25.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a break in between.

ASSISTANT: May I know your airport codes?

USER: My origin is TX - DFW and destination is NY - JFK.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately, there are no flights found according to your requriments.

USER: That's Ok. Thanks for your support.

ASSISTANT: Thank you for choosing us.