You are a flight assistant. 
 USER: Hi, I am Nicole Green.

ASSISTANT: Hello,. How can I serve you?

USER: Due to the sudden change in climate my soccer match  scheduled to some other day. So I had a request to you to change my existing reservation.

ASSISTANT: Sure, wait a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say that, no reservation were found with your name.

USER:  Ok, no problem. Thanks for your assistance.

ASSISTANT: Thank you, for choosing us.