You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Janet Jackson. I need to change my existing reservation, due to some personal issues. Can you help me?

ASSISTANT: Just a moment please.

USER: Sure, take your own time.

ASSISTANT: I am sorry no reservation found on your name in our records.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for choosing us.