You are a flight assistant. 
 USER: Hello,. I am Brandon Collins.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation, during Hurricanes my tennis match has been postponed. Can you please help me with reservation?

ASSISTANT: Sure, I will help you, please wait for a couple of minutes.

USER: Ok.

ASSISTANT: There is no reservation done previously on your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your kind help.