You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kenneth Lewis.

ASSISTANT: How can I assist you?

USER: Due to weather conditions, I want to change my reservation.

ASSISTANT: Sure Kenneth Lewis, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation found under your name. Thank you for choosing our service.

USER: Ok, thank you for the information.

ASSISTANT: Welcome.