You are a flight assistant. 
 USER: Hello. Karen Moore here.

ASSISTANT: Hello, How can I assist you?

USER: I would like to cancel my recent reservation as my doctor suggested me to avoid travelling. Can you help me?

ASSISTANT: Sure, Please wait a second.

USER: Sure, take your time.

ASSISTANT: We have found a reservation, Shall I cancel it?

USER: Yes, please proceed with cancelling it.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for helping me with cancellation of my flight tickets.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.