You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello.

USER: I am Paul Wright.

ASSISTANT: How can I aid you today?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?

ASSISTANT: Please be on hold for a minute.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name in our database.

USER: NO issue. Thank you.

ASSISTANT: Thank you for reaching us.