You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Parker.

ASSISTANT: Ronald Parker, how may I assist you with today?

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

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: I am sorry to inform you that there is no ticket booked on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us. Have a great time.

USER: Thanks for your information.