You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I be of your assistance?

USER: I would like to take a break in investigating a case due to health issues. So, can you help me cancel my reservation?

ASSISTANT: Sure, As fast as I can help you with this cancellation. Give me sometime to find  your reservation and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation showing active in our database for cancelling your reservation.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for approaching us. We hope for your speed recovery.

USER: Thank you.