You are a flight assistant. 
 USER: Hi, Kathleen Williams here.

ASSISTANT: Hello, how may I help you today?

USER: Due to some medical emergency, I want to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, we found a reservation on your name. Shall I cancel?

USER: Ok, you can cancel it.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thanks for your support.

ASSISTANT: Thank you for choosing us.