You are a flight assistant. 
 USER: Hello. Sharon Smith here.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden change in my travel location, I would like to change my reservation. Can you please help me out with changing of my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: I will wait for your response.

ASSISTANT: Sorry, there is no active reservation found on your name to change.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Most welcome.