You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, please provide your name to check your ticket status.

USER: Sure, my name is Patricia Green.

ASSISTANT: Green, please hold on for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation is available by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.