You are a flight assistant. 
 USER: Hello, James Jones here.

ASSISTANT: Hello, how may I assist you?

USER: Can Can you please help me in changing my recent reservation? As I'm unable to do journeys right now because of health issues.

ASSISTANT: Sure, hold on for a moment. Let me check.

USER: Sure, I'll wait.

ASSISTANT: Sorry Jones, there are no flights reserved on your given name.

USER: That's ok, thank you for giving the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.