You are a flight assistant. 
 USER: Hello, David Hill here.

ASSISTANT: Hello, how may I support you today?

USER: I want to book a ticket from New York, NY - JFK to meet my family friend. Can you please book a ticket to Oakland, CA - OAK?

ASSISTANT: Sure, let me know your travelling dates please?

USER: My travelling dates are 08/22 and 08/24.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights are available with your requested dates.

USER: Ok, no issues.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thank you.