You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I have to change my reservation as my father is unwell, please do that for me.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: My name is Jack Carter.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your precious time. Sorry, there is no active reservation found on your name.

USER: Oh! Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.