You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Can I have your good name?

USER: I am Jack Garcia.

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

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.