You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: Myself Charles Edwards. I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, let me check the status and revert you?

USER: Thank you. Take your time.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us.