You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this minute?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Ok, I will help you with that. Can I know your name?

USER: Thank you for accepting my request. Myself William Thompson.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, not an issue.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your information.