You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Due to bad weather conditions I cannot attend my meeting. Can you help me to change my existing reservation?

ASSISTANT: Sure, please wait for a moment to check your details. May I know your name?

USER: Sure, my name is Raymond White.

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

USER: That's ok, thank you.

ASSISTANT: Welcome.