You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know which service do you need from our agency?

USER: I want to cancel my reservation due to some health issues, so please help me in cancellation.

ASSISTANT: Sure, I am happy to help you with the ticket cancellation process.

USER: Thank you.

ASSISTANT: On which name you have reserved your past reservation?

USER: Sure, I am Jonathan Green.

ASSISTANT: Ok, please allow me sometime to check the ticket status.

USER: Sure.

ASSISTANT: I have found your past reservation successfully in the database. Shall I proceed to cancel the ticket?

USER: Sure.

ASSISTANT: As per your request, I have cancelled your existing reservation.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for choosing our travel agency.