You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my existing reservation, due to heavy rains. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: My name is Laura Wright.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok, thank you for your service.

ASSISTANT: Welcome.