You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Williams Scott.

ASSISTANT: How can I assist you today?

USER: I need to change my reservation, due to the inconvenience of travel dates. Can you please help me out?

ASSISTANT: Sure, please allow me a moment.

USER: Sure, take your own time.

ASSISTANT: Williams, there is no reservation found under your name.

USER: Not a problem, anyway, thank you for searching.

ASSISTANT: You are welcome.