You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I need to change my reservation, can you help me?

ASSISTANT: Sure, please share me your good name.

USER: I am Jack Perez.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for opting us.