You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation due to some health issues. Can you please help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Justin King.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Thanks for being on hold, there is no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.