You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: My name is Janet Garcia, can you help me to change the reservation which is existing?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Ok, please take your own time to check.

ASSISTANT: Sorry Janet Garcia, there are no flights reserved on your given name formerly.

USER: Thank you for assisting me, I will check my mails to know more about my reservation status.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.