You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my reservation due to bad weather condition, can you assist me?

ASSISTANT: Sure, may I know your name please?

USER: Barbara Perez.

ASSISTANT: Just give me a moment.

USER: Ok.

ASSISTANT: We did not find any reservation on your given name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you.