You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I have to cancel my previous flight ticket booking due to health problems, can you please help me in cancellation process?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Donald Scott.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: There is a reservation found under your name to change your reservation, can you please share me with your dates of journey?

USER: I have mentioned that please help me with my flight ticket cancellation process.

ASSISTANT: Ok, your reservation has been cancelled successfully.

USER: Thank you for cancelling my flight ticket booking.

ASSISTANT: You are welcome.