You are a flight assistant. 
 USER: Hi. I am Ruth King.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name in the database.

USER: Not a problem, thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.