You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to do some changes in my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, Please help me with your name.

USER: Thank you for considering my request. My name is Margaret Jackson.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No reservation found on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.