You are a flight assistant. 
 USER: Hello. I am Richard Johnson.

ASSISTANT: Hello, How can I help you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, Please wait a moment.

USER: Thank you.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for opting us.