You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Actually my Foot Ball competition is postponed so that I want to change my existing reservation, can you help me?

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Sure, I am Christine Miller.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Christine, there is no reservation found on your name.

USER: Ok, thank you for your help.

ASSISTANT: You are welcome.