You are a flight assistant. 
 USER: Hello, I am Patricia Walker.

ASSISTANT: Hello, do you want to any service from us?

USER:  I want to cancel my recent reservation, because I want to travel  with my friends by road, can you please help me in cancelling?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.