You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Thank you. Myself Dennis Martin.

ASSISTANT: Please wait for a moment to check.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on 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 reaching us.

USER: Most welcome.