You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you today?

USER: I am Carolyn Garcia. As meeting with my manger was postponed, Can you please change my reservation?

ASSISTANT: Sure, I will help you Carolyn Garcia. Please, stay online I will check and revert you back.

USER: Ok.

ASSISTANT: Thank for waiting. I regret to inform you that we gone through our reservation list, there is no reservation found with your name.

USER: Sure. Thank you.

ASSISTANT: Thank you for reaching us.