You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kimberly Green here. I need to change my recent reservation due to I am feeling unwell right now. Can you please help me with that?

ASSISTANT: Sure. Give me a moment.

USER: Sure, take a time.

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

USER: Ok, its fine. Thank you for your information.

ASSISTANT: You are welcome.