You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Sarah Scott. I want to change my travelling dates due to minor change in my trip plan, can you please help me?

ASSISTANT: Sure, I am here to help you with your concern. Please hold on a moment.

USER: Sure.

ASSISTANT: Sarah Scott, no reservation has been found on your name in our database.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.