You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Larry King here. Can you find a flight from SFO to JFK?

ASSISTANT: Sure, can I know the dates please?

USER: My planning to visit my family on 07/19 and 07/21.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Please search a flight. Sure.

ASSISTANT: Sorry King, there is no flight scheduled on those dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.