You are a flight assistant. 
 USER: Hello,.

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

USER: Can you please help me in changing my existing reservation, as my exam got postponed.

ASSISTANT: May, I know your good name?

USER: Please help me in changing? My name is Angela Carter.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.