You are a flight assistant. 
 USER: Hello, I am Daniel Anderson.

ASSISTANT: Hello,. How may I help you?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Please wait for a while.

USER: Ok,.

ASSISTANT: No reservation found by name Daniel Anderson.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thanks for the help.