You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Laura Lopez. Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Laura Lopez, I will help you.

USER: Thank you.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Laura Lopez, I am sorry to inform you that there is no booking done on your name.

USER: No problem, thank you for the information.

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