You are a flight assistant. 
 USER: Hello. I am Barbara Parker.

ASSISTANT: Hello Parker, how may I help you today?

USER: I want to attend a wedding in New York. Can you book a ticket from JFK to LGA?

ASSISTANT: That's nice, can you please share me with your dates of travel?

USER: I want to travel on 08/16 and 08/18.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Parker, there is no flight found as per your travelling details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome.