You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I can help you. May I know your name?

USER: Thank you. Myself Dennis Edwards.

ASSISTANT: Sorry Dennis Edwards, no reservation is available by your name.

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

ASSISTANT: Thank you for choosing us.

USER: Most welcome.