You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.