You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, I am here to assist you. Please provide your name.

USER: My name is Paul Smith.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, No reservation was found on your name to change it.

USER: Not an issue, thank you.

ASSISTANT: Thank you for availing us.