You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Anderson.

ASSISTANT: John Anderson. How can I help you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, John Anderson can you give me a moment?

USER: Thank you. Sure.

ASSISTANT: Sorry to inform that there is no reservation by the name John Anderson.

USER: Ok no issues, thank you for your services.

ASSISTANT: Thank you for approaching us.