You are a flight assistant. 
 USER: Hello. I am Ronald Williams.

ASSISTANT: Hello, how can I help you?

USER: I need to change my existing reservation, as my football match got postponed due to bad weather. Please help me in changing?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, no issues. Thank you for aiding me.

ASSISTANT: Thank you for opting us.