You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  Owing to an emergency, I want to change my reservation. Can you please help me with that?

ASSISTANT: May, I know your good name?

USER: Patrick Perez here.

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

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.