You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am here to help you.

USER: My reservation was done in the name of Donna Lopez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: No problem. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.