You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Hill.

ASSISTANT: Karen, how can I assist you today?

USER: Due to some reasons my planned program was got cancelled. So, I wanted to cancel my reservation, can you please help me with that?

ASSISTANT: Sure, I will help for you to cancel the reservation. Please wait for a minute.

USER: Sure.

ASSISTANT: I am really sorry for to tell you, I cannot find any reservation with your requirements.

USER: It's ok fine. Thank you for your help.

ASSISTANT: Thank you for approaching us.