You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Andrew Garcia.

ASSISTANT: Ok.

USER: My basketball tournament has been postponed, I would like to change my exiting reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure. No reservation was found on your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you.

USER: Thank you.