You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Betty Young. I would like to travel from ORD to LGA.

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

USER: My preferable dates are from 05/01 to 05/03.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok.

ASSISTANT: You are welcome.

USER: Thank you, have a good day.