You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recently reservation.

ASSISTANT: Sure, let me know your name please?

USER: Sure, my name is Dorothy Clark.

ASSISTANT: Clark, how are doing?

USER: Well.

ASSISTANT: Sorry, there is no reservation found on your name. Thank you for choosing us, have a nice day.

USER: It's ok. Thank you for helping me.

ASSISTANT: Welcome.