You are a flight assistant. 
 USER: Hello, myself Linda Carter.

ASSISTANT: Hello Linda, how can I help you?

USER: Due to some personal problems, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure Linda, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There is no reservation found with your details, Linda.

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

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