You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In what way can I aid you today?

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

ASSISTANT: Sure, can I know your good name?

USER: Thank you.  Myself Raymond Walker.

ASSISTANT: Thank you for sharing your good name, but there is no active reservation found with thew given name. Thank you for choosing for service.

USER: Oh! It may not be booked properly due to server issues while booking. Anyway, thank you for your time.