You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: 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, I will help you. Please help me with your name.

USER: Pamela Campbell is my name.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Thank you. Pamela Campbell, I am really sorry to inform you that there is no booking found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.