You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am James Collins.

ASSISTANT: How may I help you today?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Sorry to inform you that, there is no reservation found on your name in our database.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for consulting us.