You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, I am here to help you with this. May I know your name please?

USER: I am Kimberly Clark.

ASSISTANT: Ok, please wait for a mean while. Sorry Clark, there is no active reservation found under your name to cancel it in your database.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome.