You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: We are planning for a business trip, we would prefer to travel to New York NY - JFK from San Francisco CA - SFO. We want to fly on 06/03 and 06/05.

ASSISTANT: OK, please wait for a while. I will check the availability and let you know.

USER: Sure.

ASSISTANT: Thanks for your patience. unfortunately there are no flights available. May I know your good name?

USER: OK, thanks for your assistance.