You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: I am William Robinson want to meet my grand parents who are living in Oakland, can you book a ticket with price below 200?

ASSISTANT: Sure, may I know your journey dates?

USER: Yes, my travel dates are 11/01 and 11/03.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need 1 connection flight.

ASSISTANT: Can you please provide me your journey points?

USER: Sure, I would like to travel from EWR to OAK.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry there is no flights found on your journey details.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for communcating us. Have a nice day.