You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation as my get together program got postponed. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: I am Jennifer Baker.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is no reservation found under your name to change.

USER: Ok fine, thanks for checking.

ASSISTANT: Thank you for opting us.