You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I made a earlier reservation to attend a conference, due to some security issues it got postponed. Can you please help me to change my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thnak you.

ASSISTANT: There is no reservation found with your name. May I know your name?

USER: Sure, my name is Pamela Lopez. Can you please recheck with my name?

ASSISTANT: Sure, hold on a moment. I will check the reservation on your name.

USER: Sure.

ASSISTANT: There is no reservation found with Pamela Lopez.

USER: Ok, not  an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.