You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: I have 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 Christopher Lee.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that there is no reservation found with your name to change.

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.