You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my reservation as my college annual day program got postponed. Can you help me?

ASSISTANT: May I know your name?

USER: I am Nancy Hernandez.

ASSISTANT: We regret to inform you that there is no active reservation found on your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for contacting us.