You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Kimberly Lewis here.

ASSISTANT: Ok, wait a moment please.

USER: Sure, I will wait.

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

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

ASSISTANT: Thank you for approaching us.