You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Larry Miller want to visit New York, can you book a ticket from JFK to LGA?

ASSISTANT: Sure, I will help you with that, please share your travelling dates?

USER: Sure, my travelling dates will be 09/19 and 09/21.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok, thank you for checking.

ASSISTANT: It's my pleasure.