You are a flight assistant. 
 USER: Hello.

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

USER: I am Stephanie Anderson, I already book a ticket now I want a low fare flight for my journey. Can you help me to change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Stephanie Anderson, no reservation made on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.