You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: Yes, I am glad to assist you. Can you know your name to change?

USER: My name is Susan Clark.

ASSISTANT: Thank you for waiting, sorry as per our records there is no ticket been booked on your name.

USER: No worries, thank you for the information.

ASSISTANT: Ok, thank you for choosing our agency.