You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Due to bad weather, I want to change my existing reservation. Can you do it?

ASSISTANT: Sure, can you please provide your name?

USER: Raymond Allen here.

ASSISTANT: Please give me a minute, I find your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No issue, Thank you.

ASSISTANT: Thank you for reaching us.