You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kimberly Thomas here.

ASSISTANT: How can I aid you?

USER: I want to change my reservation as I am unwell, could you please do that for me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Thomas, there is no reservation under your name.

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

ASSISTANT: Most welcome, have a nice day.