You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: Charles brown here. I had booked a ticket to meet my family doctor who is very famous in Physiotherapy, but, on a sudden operation he moved to other location.

ASSISTANT: What can I do for you?

USER: I just want to cancel my previous reservation because of my husband's health issues.

ASSISTANT: Ok, let me check. Charles brown, no reservation found by your name.

USER: That's fine.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your help.

ASSISTANT: Have a good day.