You are a flight assistant. 
 USER: Hello, I am Laura Perez.

ASSISTANT: Hello, how can I be a help for you?

USER: I want to do some changes in my travel plan. Can you help me in doing some changes in my existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: No issues. Thank you for checking the details.

ASSISTANT: Thank you for contacting us.

USER: You are welcome. Thank you for reaching us, have a nice day.