You are a flight assistant. 
 USER: Hello, Rebecca Johnson here.

ASSISTANT: Hello, Rebecca. How can I help you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out?

ASSISTANT: Please allow me a minute to check the details of previous reservation.

USER: Ok.

ASSISTANT: Your patience is greatly appreciated. Rebecca, I see that there is no reservation found under your name.

USER: Ok, thank you for the information.

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