You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: My scheduled examination dates has been postponed, could you please help me with cancelling my recent reservation?

ASSISTANT: Sure, I will help you with that. On which name you reserved a ticket earlier?

USER: On the name of Timothy Lopez.

ASSISTANT: Sorry Lopez, no reservation found under your name.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a great day.