You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Scott Davis.

ASSISTANT: How can I aid you?

USER: I want to change my existing reservation as my business trip got rescheduled. Please help me out.

ASSISTANT: Sure, We are here to help you. Give me a minute.

USER: Thank you.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us.