You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to change my existing reservation which was made on the name of Patrick Hall. Can you help me with it?

ASSISTANT: Sure. Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: It's ok, thank you.

ASSISTANT: Thank you.