You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to visit the Oakland museum of California which is located in OAK.

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My travel dates are July 11 and 13.

ASSISTANT: May I know your source airport code please? Are you looking any other help from my side please?

USER: My source is from San Francisco, SFO.

ASSISTANT: Ok, wait for a mean while please.

USER: I am looking for a business class flight. Sure.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: Ok, thank you.

ASSISTANT: May I know your name please?

USER: Elizabeth Martinez.

ASSISTANT: Thank you for reaching us.

USER: Thank you.