You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, is there anything else I can help you with?

USER: I have planned to go for Austin but I have a small meeting in Los Angels, so can you please change my existing reservation?

ASSISTANT: Sure, I will definitely help you. Could I know your name please?

USER: Ok, myself Jack Smith.

ASSISTANT: Smith, there is no reservation with your name to change further.

USER: Ok, fine not an issue. Thank you for informing me.

ASSISTANT: Thank you.