You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: My name is Jerry Williams.

ASSISTANT: Hi Williams, how can I assist you today?

USER: Can you help me in cancelling the ticket?

ASSISTANT: Sure, give me a minute.

USER: OK.

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

USER: That's OK.

ASSISTANT: Thank you.

USER: Thank you.