You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Justin Campbell.

ASSISTANT: Justin, how can I help you today?

USER: I want to change my reservation as I am unwell, could you please do that for me?

ASSISTANT: Sure, I will help you with that. Please hold on for a moment.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry Justin, there is no reservation found under your name.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for choosing us.