You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you assist this time.

USER: Myself Catherine Martin.

ASSISTANT: Ok.

USER: I want to book a ticket from 04/22 to 04/24, to visit Faneuil Hall.

ASSISTANT: May I know your travelling codes?

USER: My source JFK to destination BOS. Connection limit should be 1. Price should be 500.

ASSISTANT: Ok, sure please wait a minute.

USER: Ok.

ASSISTANT: Sorry, no flights found with with your price limit. Thank you for choosing us.

USER: Ok, that's fine. Thank you for your services.

ASSISTANT: You are welcome.