You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Joshua Thomas, want to cancel my recent reservation due to some personal problem. Please help me out with that.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.