You are a flight assistant. 
 USER: Hello, I am Richard Lewis.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to go for Music festival at New York, can you please book a ticket?

ASSISTANT: Sure. Can you please provide the travelling dates?

USER: I want to travel on 12/03 and return on 12/05.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight. Price limit is 5000.

ASSISTANT: May I know your airport codes?

USER: My source is at San Francisco, CA-SFO and destination is at New York, NY-EWR.

ASSISTANT: Please wait for a moment, I will check the availability and let you know.

USER: Ok.

ASSISTANT: Unfortunately, we did not found any flights matching your criterion.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for opting us.