You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you aid me to change my reservation due to emergency?

ASSISTANT: Sure, May I know your name?

USER: Robert Lee here.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.