You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to change my reservation, help me in changing my reservation?

ASSISTANT: Sure, we are here to help you. Can I know your name please to proceed further?

USER: I am Deborah Hernandez.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: That's ok, thank you.

ASSISTANT: Thanks for reaching us.