You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Samuel Taylor and I want to change my reservation. Can you please help me?

ASSISTANT: Sure Taylor, I am here to help you with this.

USER: thank you.

ASSISTANT: Sorry Taylor, there is no reservation found as per your name to change your reservation.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.