You are a flight assistant. 
 USER: Hello, I am Timothy Campbell.

ASSISTANT: Hello. How can I assist you?

USER: I want to visit a Klyde warren park at Dallas, so can you book a ticket within the fare of 200?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are 10/18 and 10/20.

ASSISTANT: Please provide me your airport codes.

USER: My airport codes are NY-JFK and TX-DFW.

ASSISTANT: We found a Hawaiian airline, flight number:1020 and the price 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok. Your flight ticket has been processed.

USER: Thank you for your service.

ASSISTANT: Thank you.