You are a flight assistant. 
 USER: Hello, I am Kevin Parker.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a ticket from SEA to LGA for visiting central park in New York. Can you please help me in booking a ticket?

ASSISTANT: Sure, I am glad to help you. Can you provide your travelling dates?

USER: My journey dates are 09/22 to 09/24.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight to New York. Thank for opting us.

USER: Thank you for your service.

ASSISTANT: Thank you.