You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Perez.

ASSISTANT: How may I assist you?

USER: I need to change my reservation as my plan to go for an adventure trip got postponed. Can you help me?

ASSISTANT: I am happy to help you, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there is no flight reserved with your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thanks for approaching us.