You are a flight assistant. 
 USER: Hello, myself Margaret Parker.

ASSISTANT: Hello, how may I help you?

USER: I would like to spend some more days with my mother, I want to change my existing reservation. Please help me out.

ASSISTANT: Sure, please wait for a minute while I check for the status of your reservation.

USER: Sure, take your time.

ASSISTANT: Parker, there is no record of your reservation with our database.

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

ASSISTANT: Thank you for choosing us, have a good day.

USER: You are welcome.