You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: I want to change an existing reservation, because my Foot Competition is postponed Can you help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Can you please tell me your name?

USER: Sure, I am Joshua Nelson.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for opting us, have a great day.