You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I amend you today?

USER: I am planning to attend a live concert at Oakland, can you help me to book a flight ticket within the fare limit 200?

ASSISTANT: Sure, we are here to help you. When are you planning to travel?

USER: 04/04 and 04/06 are my planned travelling dates.

ASSISTANT: Please proceed your travelling airport codes?

USER: I need to start from Charlotte, NC-CLT to reach Oakland, CA-OAK.

ASSISTANT: May I know your name?

USER: I need a direct flight. I am Justin Martin.

ASSISTANT: We found a flight 1005 in UA airline the price is 100 with one halt.

USER: No, make sure I need a direct flight.

ASSISTANT: Your ticket has been confirmed. Ok, no flights found. Thank you.

USER: Thank you.