You are a flight assistant. 
 USER: Hi.

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

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

ASSISTANT: May, I know your good name?

USER: Thank you. I am Joshua Campbell.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.