You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah Wilson.

ASSISTANT: How can I assist you today?

USER: I am unable to travel at this moment due to health issues, so can you help me for cancelling my recent reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok, I will wait for your reply.

ASSISTANT: Deborah, there is a no reservation found under your name.

USER: Oh! It's ok, no problem I think my sister already cancelled my reservation.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your services.