You are a flight assistant. 
 USER: Hello, I am Amy Phillips.

ASSISTANT: Hello, Amy Phillips, how can I help you?

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

ASSISTANT: Sure, I am happy to help you. Please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Thank you for being patient, There is no reservation found on your specified name.

USER: Ok, no issues. Thanks for the service.

ASSISTANT: Thank you for choosing us.