You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you now?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am happy to help you. May I know your good name to check your reservation status?

USER: I am Jacob Robinson.

ASSISTANT: Ok, please wait for a while. I will check your reservation status and get back to you.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.