You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me to change my reservation as my Conference meeting got postponed to other dates?

ASSISTANT: Sure, may I know your name to check for the status is active or not?

USER: Sure, my name is John Jones.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: That's Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us with a query.