You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Kathleen Allen. Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, we are here to help you. Please wait for a moment.

USER: Thank you.

ASSISTANT: Thanks for waiting,there was no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.