You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Pamela Wright. I want to change my existing reservation, can you help me?

ASSISTANT: Sure, just a moment please.

USER: Ok, take your time.

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

USER: Ok no problem, thank you for the information.

ASSISTANT: Thank you for choosing us.