You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to meet my business client in New York, so please help me to book a flight ticket from JFK to EWR.

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates are 09/25 and 09/27.

ASSISTANT: Can I know your name?

USER: My name is Daniel Taylor.

ASSISTANT: Sorry Taylor, there are no flights available on your requested dates.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.