You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you for today?

USER: I would like to spend some more days with my kids in Washington DC, can you please help me to change my reservation?

ASSISTANT: Sure, I am help to help you happily.

USER: Thank you.

ASSISTANT: Could you please tell me your name for further proceedings?

USER: My name is Matthew Thomas.

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

USER: Not an issue, thank you for checking.

ASSISTANT: You are welcome.