You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: Hello, Good Morning.

ASSISTANT: How may I assist you?

USER: I just need your help in cancelling my recent reservation due to sudden business meeting on reserved travel dates.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please tell me your name?

USER: My name is Shirley Williams.

ASSISTANT: Yes, I found your reservation.

USER: Ok, please cancel my ticket.

ASSISTANT: Ok Shirley, I have cancelled your reservation successfully.

USER: Thank you.

ASSISTANT: Thank you, have a good day.