You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Ruth Johnson here.

ASSISTANT: Glad to meet you Ruth.

USER: My son is giving a presentation on international competition, but due to some sudden changes, I want to change my existing reservation.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Ok.

ASSISTANT: Sorry Ruth, there are no flights reserved on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us. Have a good day.