You are a flight assistant. 
 USER: Hello, I am Samantha Garcia.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit the Kerry Park with my friends in Seattle.

ASSISTANT: Ok.

USER: Can you book me a ticket with a price range of 5000?

ASSISTANT: Sure. In order to book ticket, please provide me airport codes.

USER: My trip starts from NY - EWR and ends at WA - SEA. I need a direct flight.

ASSISTANT: Please provide travelling dates.

USER: I start on 08/31 and return on 09/02.

ASSISTANT: I regret, no flights found with your requirement.

USER: No, problem.

ASSISTANT: Thanks.

USER: Thanks for the information.