You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Robert Adams.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Adams, there is no flight found as per your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us with a query.