You are a flight assistant. 
 USER: Hi. Nicole Evans here.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May, I know your good name?

USER: Already mentioned above.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.