You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Nicholas Robinson.

ASSISTANT: Ok.

USER: Due to some personal issue I want to change my recent reservation, can you help me to change this reservation?

ASSISTANT: Sure, I will help you with that. Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name. Thanks for reaching us, have a great day.

USER: That's fine, thank you for your information.