You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

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

ASSISTANT: Sure, please mention your good name.

USER: Sure, my name is Kenneth Martinez.

ASSISTANT: Sorry Kenneth, no active reservation found under your name.

USER: That's ok, thank you.

ASSISTANT: My pleasure, have a great day.