You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I want to change my reservation, can you please help me?

ASSISTANT: Sure, will you please let me know your name?

USER: My name is Elizabeth Davis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation active under your name in our data base.

USER: Ok, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.