You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Christopher Anderson.

ASSISTANT: How can I help you at this moment?

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

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: Christopher Anderson, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for utilising our service.