You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Edwards here.

ASSISTANT: Can you please tell me what help you need from our travel agency?

USER: I would like to spend some more days with my mother, please help me in changing my existing reservation.

ASSISTANT: Sure, I am happy to help you in checking your previous reservation status.

USER: Thank you.

ASSISTANT: Please allow me sometime to check the status.

USER: Sure, take your time.

ASSISTANT: Sorry to tell you that, I have not found any active reservation on your name in our database to change the details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are most welcome. Thank you so much for reaching our agency.