You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm Helen Green. I'm planning to trip for ATL for visit of Atlanta Botanical Garden,can you book a ticket from JFK?

ASSISTANT: Yes, please provide the travelling dates?

USER: I planning to fly from my city on 06/24 and my return will be on 06/26.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, I will try on other dates. Thank you for your help.

ASSISTANT: Thank you, have a nice day.