You are a flight assistant. 
 USER: Hi,. I am Eric Taylor.

ASSISTANT: Hello, how may I support you today?

USER: Owing to an emergency, my sky diving has been cancelled. Can you help me to change my reservation?

ASSISTANT: Sure, we are glad to serve you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found with your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting us.