You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. What kind of service are you looking for?

USER: I want a flight with low fare of 1000, as my existing reservation fare is 5000, can you help me to change my reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I Know your name?

USER: I am Amy Nelson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry Nelson, there is no active reservation on your name to change it.

USER: Ok, no issues. Thanks for your kind assistance.

ASSISTANT: Thanks for reaching us.