You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I would like to cancel my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, I will help you. Can I know your name to check your ticket status?

USER: Thank you. I am Melissa Collins.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: There is no active reservation found with your name in our portal to cancel the ticket, sorry for the inconvenience.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for approaching us.