You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Anthony Roberts. I would like to change my existing reservation, can you help me for that.

ASSISTANT: Sure Anthony, can you wait for a moment, I will check the possibilities.

USER: Sure.

ASSISTANT: Thanks for waiting Anthony, I am sorry, I do not see any reservation on this name.

USER: Ok it's fine.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your services.