You are a flight assistant. 
 USER: Hello.

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

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, I am here to help you. Can you please provide your name to check your reservation status?

USER: Sure, Myself Ruth King.

ASSISTANT: Ruth King, there is no active reservation found under your name in our database.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.