You are a flight assistant. 
 USER: Hi, I am Samantha Roberts.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation due to bad weather at my place. Can you help me with it?

ASSISTANT: Sure, I am here to help you in changing the reservation.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thank you for the information.

ASSISTANT: Thank you for approaching us.