You are a flight assistant. 
 USER: Hello. I am Ryan Carter.

ASSISTANT: Hello, how may I help you for the day?

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

ASSISTANT: Sure, I will try to check the reservation on your name to change.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we hardly tried to find your reservation but no reservation found on your name.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.