You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to go for LGA, can you please help me out?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are 11/15 and 11/17.

ASSISTANT: Ok, may I know your source airport code please?

USER: My source code is EWR.

ASSISTANT: Ok, hold on for a moment. Let me check. May I know your name please?

USER: Myself Donna Green.

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

USER: Ok, fine Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us.