You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Richard Jackson. I want to change my reservation, could you help me out?

ASSISTANT: Ok Richard, please give me a moment to check our database.

USER: Sure, take your time.

ASSISTANT: Sorry Richard, there is no reservation found on your name in our records.

USER: Thank you for your time.

ASSISTANT: You are welcome.