You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change an existing reservation due to an emergency, can you please help me?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Debra King here.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for approaching us.