You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Please change my existing reservation to new dates, which I have done with my name Betty Wilson. Can you help me over that?

ASSISTANT: Betty Wilson, I will help you with this. Wait a moment please.

USER: Sure, take your time.

ASSISTANT: I have searched the database and couldn't find any active reservation under your name.

USER: It's ok, thanks for checking my status.

ASSISTANT: Thank you for contacting us.