You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: James Robinson here.

ASSISTANT: How can I assist you?

USER: I just want to change my existing reservation, due to some health issues. Can you help with it?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.