You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Stephen Mitchell here.

ASSISTANT: How may I assist you today?

USER: Can you cancel my recent reservation which I have done with my name?

ASSISTANT: Sure, I am oblige to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure, take your own time.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us, have a great day.