You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Cynthia Scott. I want to change an existing reservation, due to bad weather conditions. Could you help me in changing the reservation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Cynthia, there is no reservation found on your providing name.

USER: Not an issue.

ASSISTANT: Thank you for availing us.

USER: Thanks for your service.