You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Richard Hernandez. I am planning to attend music concert at DTW, can you please help me with booking a flight ticket from OAK?

ASSISTANT: Sure, I am here to help you with that. Please share your travel dates also.

USER: Sure, I would like to take off on Nov 16 and return on Nov 18.

ASSISTANT: Please wait a moment.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

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

ASSISTANT: Thank you for reaching us, have a safe flight.

USER: You are welcome.