You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Unexpectedly, the trip which is planned got cancelled. So, I want to cancel my ticket. Can you please help me?

ASSISTANT: Thank you. May I know your name please?

USER: My name is Sharon Evans.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Happy to inform you there is a reservation.

USER: That's great, please cancel my ticket.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thanks a lot for your king help.

ASSISTANT: Thank you for choosing us.