You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Carter.

ASSISTANT: How may I aid you/.

USER: I want to cancel my reservation due to my convocation has been cancelled.

ASSISTANT: Ok, I will help you to cancel your reservation.

USER: Ok.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting. There was no recent reservation found on your name.

USER: Not an issue, thank you for kind information and help.

ASSISTANT: Thank you for choosing our service. Have a nice day.