You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please change my reservation, due to an emergency?

ASSISTANT: Sure, may I know your name please?

USER: My name is Anna Collins.

ASSISTANT: Please wait.

USER: Sure.

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

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for reaching us.