You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, can I  know your name.

USER: My name is Carolyn Rodriguez.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Sorry, no reservation found on given name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.