You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to cancel my recent reservation because my health condition was not good, can you help me?

ASSISTANT: Yes, can you tell me your name?

USER: Karen Hernandez here.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you so much.

ASSISTANT: Thank you for contacting us.