You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: As my meeting got postponed to other day, I would like to change my existing reservation. Will you help me with this?

ASSISTANT: Sure, I will help you with the change of flight reservation. May I know your name please?

USER: My previous reservation has done with my name Stephanie Turner.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no reservation on your name.

USER: Ok, not an issue. May be something went wrong while booking the ticket previously. Anyways, thank you for checking the reservation status.

ASSISTANT: Thank you.