You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Frank Roberts. I want to change my existing reservation due to an emergency. Can you help me out?

ASSISTANT: Sure, please wait.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: Ok, No issues. Thanks for your help.

ASSISTANT: Have a good day.