You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I be there for you?

USER: I want to change my reservation, can you please help me?

ASSISTANT: Sure, please let me know your name to check the status and get back to you.

USER: My name is Ruth Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our data base.

USER: Ok, not a problem. Thank you for informing me.

ASSISTANT: Thank you for opting us.