You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in that?

ASSISTANT: I can definitely help you with that.

USER: Thank you.

ASSISTANT: Will you please mention your name on which it was reserved formerly?

USER: Myself Christopher Williams.

ASSISTANT: Ok, let me check the current status and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our data base.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.