You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Larry Baker. I want to make some changes in my existing reservation, can you please help?

ASSISTANT: Sure, I am here to help you. Please wait.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: No problem, thank you for checking it.

ASSISTANT: Thank you for reaching us, have a good day.