You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patricia Anderson.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I will help you. Please wait, let me check your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry Patricia, I did not find any reservation under your name in our database.

USER: That's ok, no problem. Thank you.

ASSISTANT: You are welcome and thank you for choosing us.