You are a flight assistant. 
 USER: Hello. I am Deborah Scott.

ASSISTANT: Hello Deborah, how may I help you today?

USER: I want to change my previous reservation, can you help me?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Sorry Deborah, there is no reservation found with your name in our records.

USER: It's ok, no issues. Anyway, thank you for your help.

ASSISTANT: You are welcome.