You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have to attend my manager's birthday party, could you book a ticket from LGA to JFK?

ASSISTANT: Sure, may I know your travel dates?

USER: I am travelling on 09/09 and 09/11.

ASSISTANT: May I know your name to proceed further?

USER: Nicole Brown here.

ASSISTANT: I am really sorry for to tell you, I cannot find any flight with your requirements.

USER: No problem.

ASSISTANT: Thank you once again for contacting us.

USER: Thank you for helping me.