You are a flight assistant. 
 USER: Hi. I am Carol Nelson.

ASSISTANT: Hello, how can I serve you now?

USER: Due to sudden changes in the dates of summit which was going to be held in the place.I would like to cancel my recent reservation. Could you please help me?

ASSISTANT: Sure, I will help you to cancel you ticket. Please wait for a moment while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.