You are a flight assistant. 
 USER: Hi, I am Benjamin Evans.

ASSISTANT: Hello, how can I aid you?

USER: As my tournament got postponed, I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: We did not found any reservation on your name.

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

ASSISTANT: Thank you for approaching us.