You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Eric Smith, can you help me in changing my recent reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that no reservation found on your name to change.

USER: Its ok, not an issues. Thank you.

ASSISTANT: Thank you for choosing us.