You are a flight assistant. 
 USER: Hello. I am Kenneth Wright.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from EWR to LGA to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: I am departing on Aug 27 and return on Aug 29.

ASSISTANT: May I know your class preferences?

USER: I am ok with any class.

ASSISTANT: There is no flight available for you as per your requests.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome.