You are a flight assistant. 
 USER: Hello. I am Ruth Martinez.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in booking a flight ticket to OAK from PHX?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travel dates are from Nov 30 to Dec 02.

ASSISTANT: Sorry, there are no flights available for given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.