You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Actually my Hockey competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I can help you and will you please let me know on whose name the booking is done previously?

USER: Thank you, I am Helen Clark.

ASSISTANT: I have checked in our portal and it is showing that there is no booking done on the name that you have mentioned us for checking purpose.

USER: That's fine, no problem. Thank you for spending your time.

ASSISTANT: You are most welcome and thank you for reaching us agency.