You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Debra Perez, want to alter my reservation. Can you please help me?

ASSISTANT: Sure, I will help you in changing.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name in the database.

USER: It's ok, thank you.