You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Pamela Roberts, due to health issues I would like to cancel my recent reservation, so can you help me for this?

ASSISTANT: Sure, I will help you with this. Give me a moment please.

USER: Ok, I will wait for your response.

ASSISTANT: I have searched the database and I couldn't find any active reservation with the name Pamela Roberts.

USER: Oh! it is ok, no problem.

ASSISTANT: Thank you for utilising our services.

USER: My pleasure.