You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Jackson.

ASSISTANT: How may I help you?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.