You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Stephanie Lewis. As my semester exams got postponed, I need to change my reservation. Can you please change my reservation?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: No problem. Thank you.

ASSISTANT: Thanks for reaching us.