You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my reservation as I am unwell, can you please help me out?

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

USER: Sure, my name is Joshua Anderson.

ASSISTANT: Ok, give me a moment.

USER: Sure.

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

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for consulting us.