You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Scott Clark. I want to change my existing reservation due to sudden change in my plan.

ASSISTANT: Ok.

USER: Can you help me in change reservation?

ASSISTANT: Sure, we are happy to help you. Please wait a minute, I will check the reservation status and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, we did not find any reservation on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.