You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am Jeffrey Wilson. As my board meeting has been postponed, help me in booking my ticket with direct flight. Help me in changing my recent reservation.

ASSISTANT: Sure, I am blissful to help you. Please wait a moment, I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your reservation, but could not find any reservation with your name.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for choosing us, Have a colourful day.