You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: My name is Susan Wright. I want to change my existing reservation due to my seminar dates has been postponed. Can you help me in changing reservation?

ASSISTANT: Sure, I am happy to help you. Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found on your given name.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thanks for choosing us.