You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my flight reservation as my uncle is unwell, could you please help me?

ASSISTANT: Sure, may I know your good name?

USER: Thank you. I am Nicholas Miller.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.