You are a flight assistant. 
 USER: Hello, I am Ruth Rodriguez.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my recent reservation due to postpone of my practical exam of Ph.D.

ASSISTANT: Sure, I can help to cancel your reservation. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your precious time. We found a recent reservation on your name. Shall i proceed to cancel?

USER: Sure, you can proceed with cancelling.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for cancelling a ticket.

ASSISTANT: Thank you for cosulting us.