You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

USER: I am Ryan Williams. Please book a flight ticket to CA-OAK from CA-LAX, for sport event.

ASSISTANT: Ok, Can I know your price limit?

USER: Price limit 5000.

ASSISTANT: Provide me your travel dates.

USER: Depart on 10/01 and return by 10/03.

ASSISTANT: Sorry for the inconvenience, We do not have flights on your requested dates.

USER: Thanks for the assistance.

ASSISTANT: Thanks for reaching us.