You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Andrew King here.

ASSISTANT: King, how may I help you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Ok.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Thank you.

ASSISTANT: Thank you for choosing us.