You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help that I can assist you?

USER: I am Joseph Clark. I want to cancel recent reservation due to my health issue, so can you please help me with this?

ASSISTANT: Sure, I am oblige to help you and please allow me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for user name in our back end to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: You are most welcome and thank you for reaching us.