You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Jonathan Lewis. I want to change my recent reservation, can you please help me with it?

ASSISTANT: Sure, I can help you. Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.