You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Jackson.

ASSISTANT: What type of help do you need from our travel agency?

USER: I would like to cancel my recent reservation, as my exam is postponed? Can you help me?

ASSISTANT: Yes, I am here to help you with the ticket cancellation process.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no reservation found on your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: You are most welcome. Thank you for choosing us.