You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist 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 help you. May I know your name?

USER: My name is Kimberly Harris.

ASSISTANT: There is no reservation found under your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.