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

ASSISTANT: Hello, Jacob Perez. How can I assist you today?

USER: I want to change my existing reservation because I met with an accident. Can you help me with that?

ASSISTANT: Ok, please wait let me check the reservation based on your given name and revert to you.

USER: OK.

ASSISTANT: Sorry to say that there is no reservation found on your given name.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for choosing us. Have a nice day.