You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure. May I know your name for further proceeding.

USER: My name is Deborah Collins.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry Deborah Collins, we haven't found any previous flight reservation based on your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thanks for reaching us.