You are a flight assistant. 
 USER: Hello. Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, please provide me your name?

USER: Karen Jackson here.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: There is no reservation with your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for reaching us.