You are a flight assistant. 
 USER: Hello. I am Patricia Young.

ASSISTANT: Hello, How can I help you?

USER: Can you please change my existing reservation due to abnormal condition?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.