You are a flight assistant. 
 USER: Hello, I am Rebecca Clark.

ASSISTANT: Hello. How can I help you?

USER: I want to change my existing reservation due sudden demise of my grandfather. Can you help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: I am sorry to inform you that, there is no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.