You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Can you help me to change my reservation?

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

USER: I am Debra Wright.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: Sorry Debra, there is no reservation found as per your name to change it in your database.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome.