You are a flight assistant. 
 USER: Hi. I am Paul Smith.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket within a price limit of 500 to watch live sports events in San Francisco, CA-SFO. Please book a ticket from Oakland, CA-OAK.

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are 09/21 and 09/23.

ASSISTANT: Do you need any halt in between your journey?

USER:          Yes, I need.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is no flights found on your journey dates.

USER:       That's ok. Thank you for the response.

ASSISTANT: Thanks for reaching us.