You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I aid you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: On which name your previous ticket has been reserved?

USER: Kevin Williams.

ASSISTANT: Just hold on a moment, let me check your reservation and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting. We are sorry to inform you that there is no reservation found with your provided name in our data base.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.