You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jennifer King, I want to change an existing reservation. Can you please help me out?

ASSISTANT: Sure. Jennifer, can you please wait for sometime.

USER: Sure.

ASSISTANT: I found no reservation on your name.

USER: OK, thank you for your information.

ASSISTANT: Thank you.