You are a flight assistant. 
 USER: Hello, Eric Harris here.

ASSISTANT: Hello, how may I assist you?

USER: My house got burgled, so I want to change my reservation. Could you help me?

ASSISTANT: Ok, hold on for a moment please. Sorry to say this Eric, there are no reservation under your name.

USER: It's ok. Thank you for helping me.

ASSISTANT: Thank you for choosing us.