You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Cynthia Evans, want to alter my recent reservation due to some personal problem. Please help me out with that.

ASSISTANT: Sure, I am here to help you out, please hold for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with your name in our records.

USER: It's ok, thank you.

ASSISTANT: You are welcome, thank you for approaching us.