You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be a help for you?

USER: Owing to an emergency, I would like to cancel my reservation. Can you please help me out?

ASSISTANT: Ok, I am here to help you. Can you please provide the name on which the ticket is booked?

USER: Sure, I have booked it under the name of Steven Lee.

ASSISTANT: Sorry, there is no reservation found with name  Steven Lee in our database to cancel.

USER: Oh, I think my cousin had cancelled my reservation. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.

USER: Welcome.