You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Ryan Evans. I would like to travel from OAK to JFK, could you help me out?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My preferable dates are from 06/18 to 06/20. Please check with 1 connection.

ASSISTANT: Sorry, there is no flight available for your request.

USER: That's ok. Thank you for your time.

ASSISTANT: You are welcome.