You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, Can you provide me your name please?

USER: I am Steven Campbell.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT:  Steven Campbell. I regret to inform that there is no reservation by your name.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.