You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Susan Jones. I want to change my existing reservation due to some technical issues. Can you help me with that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No issues. Thank you.

ASSISTANT: Thank you for opting us.