You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Stephen Jones and I want to book the flight ticket from JFK to LGA.

ASSISTANT: Ok, I can help you with that. May I know your planned departure and return travel dates please?

USER: My travel dates are 05/14 and 05/16.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Take your time.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.