You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Robert Thomas, I need a flight ticket reservation in the month of December to attend an event in New York. Can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket. Can I know your travelling dates please?

USER: Thank you, my travelling dates are 12/14 and 12/16.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.