You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to visit Central Park at New York, please help me in booking a ticket.

ASSISTANT: Sure, I will help you to book a ticket, please provide your travel dates to search flight for you.

USER: My trip dates are 07/27 and 07/29.

ASSISTANT: May I know your travel airport codes?

USER: My airport codes are OAK to LGA.

ASSISTANT: May I know your name to proceed further?

USER: My name is Richard Turner.

ASSISTANT: I could not find any flight with your travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: It's my pleasure.