You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Rebecca Smith.

ASSISTANT: Welcome to our agency Rebecca.

USER: Can you change my flight ticket reservation? As my football match is being postponed due to bad weather in New York.

ASSISTANT: Rebecca Smith, may I know your desired airport codes for this journey? Ok, please allow me to check with your previous booking.

USER: Sure.

ASSISTANT: Sorry to tell you, there is no active reservation found by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.