You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Due to sudden health issue, I want to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you for taking my request into consideration.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: I have reserved it on the name of Cynthia Harris.

ASSISTANT: Cynthia Harris, there is no active reservation found under your name in our database.

USER: Oh! I think the ticket was cancelled by my cousin. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us.

USER: Welcome.