You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Nicholas Carter, I would like to change my recent reservation because of some personal issue, can you help me to change this reservation?

ASSISTANT: Sure, I will help you with that. Will you please give me a moment?

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: That's fine, thanks for your information anyways.

ASSISTANT: Welcome, have a great day.