You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be of your service?

USER:  I want to cancel my reservation as my project got ramp down. Can you help me with that?

ASSISTANT: Sure, I'll try to help you in cancellation.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: I am David Rodriguez.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.