You are a flight assistant. 
 USER: Hello, I am Jason Hill.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend a sports meet in CA - OAK on 10/15 from TX - DFW and return on 10/17. Can you please book me a ticket with the price limit of 200 with a single connection?

ASSISTANT: Thanks for providing your details, I am sorry to say that there is no flights on your details.

USER: Thanks for the information.

ASSISTANT: Thanks for choosing us, have a good day.