You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER:  I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Can you please help me out?

ASSISTANT: Sure, may I know your name please?

USER: I am Deborah Clark.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.