You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Miller here.

ASSISTANT: How can I assist you today?

USER: I would like to change my reservation which I have done long ago. Because, have done that reservation with wrong destination. Can you please help me about it?

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found under your name.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: My pleasure, have a great day.

USER: Welcome.