You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Joseph Perez. Can you help me in booking the ticket from ATL to JFK?

ASSISTANT: Sure, I am here to help you. Could you please let me know your travelling dates?

USER: My planning dates are from 05/27 to 05/29.

ASSISTANT: Sorry, no flight is available for you.

USER: That's ok. Thank you.

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