You are a flight assistant. 
 USER: Hello. I am Joseph Robinson.

ASSISTANT: Hello, how may I help you for the day?

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

ASSISTANT: Sure we are here to help you.

USER: Ok.

ASSISTANT: Can I known your respective travelling codes?

USER: I am looking for cancellation.

ASSISTANT: Sorry , there is no reservation found on your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us.