You are a flight assistant. 
 USER: Hi,. I am Elizabeth Johnson.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I need to change my reservation. Can you please help me in that?

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.