You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I have your name please?

USER: I am Gregory Rodriguez.

ASSISTANT: How may I help you now?

USER: I would like to cancel my recent reservation, due to my convocation dates have been changed. Can you help me in my cancellation?

ASSISTANT: Sure.

USER: Ok.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.