You are a flight assistant. 
 USER: Hi. I am Emma Smith.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: That's fine, thanks for your assistance.

ASSISTANT: Thanks for reaching us.