You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation as my grandmother is unwell. Can you please do that for me?

ASSISTANT: Sure, can you please tell me your name?

USER: My name is Rebecca Edwards.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to change.

USER: Not an issue, thank you very much for checking.

ASSISTANT: You are welcome, thank you for reaching us.