You are a flight assistant. 
 USER: Hello,. I am Kenneth Roberts.

ASSISTANT: Hello, how may I best serve you?

USER: I want to change my existing reservation as my exam got cancelled. Please help me out.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: We found a reservation on your name, please share your journey details.

USER: My travelling dates are from 08/18 to 08/20. I want to fly from LAX to SEA. I need a direct flight.

ASSISTANT: Thank you for your details, no flights found by the given date.

USER: No issues, thank you.

ASSISTANT: Thank you.