You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Martinez.

ASSISTANT: Is there any help that you are expecting from my side?

USER: Due to an urgency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: Sure, I am glad to help you in that ticket cancellaton. Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no reservation found for the name in our data base when I have checked in our data base.

USER: Ok, not an issue. May be something went wrong while booking the ticket previously. Anyways, thank you for providing information.

ASSISTANT: Yes, It may happen sometime while you are booking a ticket. Sorry for the trouble that has caused for you. Thank you for approaching us, have a great day.