You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need you to make few changes in my recent booking. Please help me.

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Kathleen Collins here.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait.

ASSISTANT: Kathleen Collins, we haven't found any reservation under your name in our database.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.