You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, can you please help me with your good name?

USER: My name is Nancy Rodriguez.

ASSISTANT: There is no active reservation found on your name in our reservation database.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.