You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to change my reservation due to some issue. So please help me with changing my reservation.

ASSISTANT: Please share your name for checking the reservation.

USER: Sure, myself Jerry Lopez.

ASSISTANT: Jerry, there is no reservation available on your name.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: You are welcome.