You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking for a direct flight from OAK, can you help me out with that?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: My travelling dates are 04/17 and 04/19.

ASSISTANT: Could you please help me with the destination airport code?

USER: My preferred airport code is SFO.

ASSISTANT: May I know your name to proceed further?

USER: My name is Sharon Wilson.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Sharon, there is no flight available at your requested dates.

USER: Oh! ok. Thank you for your search.

ASSISTANT: Thank you for contacting us.