You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to change my current reservation due to heavy rainfall in my location.

ASSISTANT: Ok, can I know your name for checking?

USER: Sure, my name is Margaret Walker.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for approaching us.