You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your good name?

USER: I am Margaret Wright.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for reaching us.