You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Catherine Nelson here.

ASSISTANT: Glad to meet you Nelson.

USER: I have to go New York for my film shooting purpose, can you please book a flight ticket from LGA to JFK?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My trip dates are 07/23 and 07/25.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Catherine Nelson, no flight is available to you on your dates.

USER: Thank you so much.

ASSISTANT: Most welcome. Thank you for choosing us, have a great day.