You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: Due to personal health issue, I couldn't attend a convocation party.So, I would like to cancel my recent reservation.

ASSISTANT: Sure, can you please share your name for better checking?

USER: Sure, my name is Mark Wright.

ASSISTANT: Ok, please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, I haven't found any reservation with your name in our portal to cancel further.

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

ASSISTANT: Thank you for connecting with us, have a nice day.

USER: You are welcome.