You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Is there any immediate help that you are looking from my side?

USER: I am Michael Miller, I need to modify my reservation suddenly my destination location got changed to SFO. Can you please help me out?

ASSISTANT: Sure, I will definitely help you in that ticket modification.

USER: Thank you for accepting my request.

ASSISTANT: Please give me some time to check your name in our booking list.

USER: Ok, have your time.

ASSISTANT: Thank you for waiting, as per your request, no reservation has found on your name when I have checked.

USER: It's ok, anyway thank you for the information and for your quick response.

ASSISTANT: Our work is to help you, thank you for utilising our service. Have a nice day.

USER: You are most welcome.