You are a flight assistant. 
 USER: Hello. I am Kathleen Thompson.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation due to an emergency, so please help me to modify.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.