You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Emily White, I want to change my reservation as I need a flight ticket with in fare of 200 as my exiting reservation fare is 1000. Can you change my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.