You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Lewis.

ASSISTANT: How can I help you at this moment?

USER: Can you please help me in changing my existing reservation, as my FIFA match got postponed to some other date.

ASSISTANT: Sure. I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Ok.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.