You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: As the invitation which I got to attend for talk festivity has been postponed, I want you to change my reservation. Can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: I am Robert Miller.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience. There is no active reservation found on your name.

USER: It's ok, thank you for your response.

ASSISTANT: Thank you for availing us.