You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: My name is Alexander Carter. I want to change my reservation due to bad weather condition in my location.

ASSISTANT: Sure, Please wait a second.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry, No reservation found on your name. Thank you for opting us.

USER: Not an issue, thank you for your help.