You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Christopher Nelson.

ASSISTANT: Glad to meet you Nelson. How can I assist you today?

USER: My exam got cancelled in this week, so can you help me to cancel my reservation? Please check my details.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment and I will check with that.

USER: Sure, take your time.

ASSISTANT: Sorry Nelson, I have not gone with your name in the reservation list to cancel the reservation.

USER: That is fine. Thank you for your help.

ASSISTANT: Most welcome. Thank you for reaching us, have a great day.