You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I oblige you?

USER: Due to sudden work, I want to change my reservation. Can you help me?

ASSISTANT: Sure. May I know your good name?

USER: Betty Walker here.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for reaching us.