You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Michelle Taylor. I am planning to attend live concert at DEN, can you please help me with booking a flight ticket from OAK?

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: Sure, I would like to take off on 06/11 and return on 06/13.

ASSISTANT: Please wait for a moment.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: Sorry to say, no flight is available for you as per your requirement.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.