You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in booking my flight ticket from JFK to SFO?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 04/11 and 04/13.

ASSISTANT: Ok, wait a moment please.

USER: Ok. Myself Jeffery Jones.

ASSISTANT: Sorry Jones, there are no flights available on your dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for approaching us.