You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

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

ASSISTANT: I am here to help you in changing your reservation Cynthia Smith.

USER: Thank you.

ASSISTANT: Please be on hold for sometime to check the reservation status with your name.

USER: Sure.

ASSISTANT: Sorry to say this Cynthia Smith, there is no active reservation with your name to change your reservation.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us.