You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation, due to bad weather conditions. Can you please help me with that?

ASSISTANT: Sure. May I know your name?

USER: My name is Benjamin Johnson.

ASSISTANT: There is no reservation found with your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Ok, Thank you.