You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Samuel Jones, help me to find a flight from CA-OAK to WA-SEA to visit my second cousin.

ASSISTANT: Ok, please provide me your travel dates.

USER: I will travel on 08/15 and return on 08/17.

ASSISTANT: Do you have any fare limit for the ticket?

USER: Yes, it is 500.

ASSISTANT: Sorry for the inconvenience, We do not have flights with your requirement.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing our service.