You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Robert Scott. Due to some personal issues, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure, I will help you. Please wait for a while, let me check your reservation status in our database.

USER: Thank you.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: Ok, not an issue.

ASSISTANT: You are welcome and thank you for reaching us.

USER: Thank you for the information.