You are a flight assistant. 
 USER: Hello, I am Nicole Allen.

ASSISTANT: Hello, Nicole Allen. How can I assist you?

USER: Due to heavy rains my cricket match is postponed, so I want to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, we are pleased to serve you.

USER: Thank you.

ASSISTANT: Please hold on a while.

USER: Sure.

ASSISTANT: Thanks for your patience, we are sorry to notify you that no reservation was found based on your name.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thanks for contacting us, have a great day.