You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: I am Debar Robinson. I want to cancel my reservation, can you help me in that?

ASSISTANT: Sure, I can help you with that. Please allow me a moment to check for the previous reservation.

USER: Sure, take your own time.

ASSISTANT: Your patience is greatly appreciated. Debar, there is no reservation found under your name.

USER: Oh might be, might be my sister has canceled the reservation. Thank you for helping me.

ASSISTANT: You are welcome. Thank you for contacting us.