You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Ryan Taylor. I want to book a flight ticket with a price limit of 200 to Oakland.

ASSISTANT: Ok.

USER: Will you help me in booking a flight ticket with a single connection?

ASSISTANT: Do you have any price limit? May I know your airport codes?

USER: I am planning to celebrate Music Festival in Oakland, CA - OAK and my origin from IL - ORD.

ASSISTANT: To proceed booking I need your travelling dates.

USER: My departure is 08/08 and return date on 08/10.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, not an issue. Thanks for your service.

ASSISTANT: Thank you have a nice day.