You are a flight assistant. 
 USER: Hi, I am Betty carter.

ASSISTANT: Hello, how can I support you today?

USER: I have a plan to visit my grandparents house at New York, please book me a flight ticket within price 1000.

ASSISTANT: Sure. May I know your journey points?

USER: My source code is JFK and destination code is EWR.

ASSISTANT: On what dates your willing to travel?

USER: My travelling are from 05/23 to 05/25.

ASSISTANT: Sorry, there is no flight found on your requested dates.

USER: No issues, thank you.

ASSISTANT: Thank you for visiting us.