You are a flight assistant. 
 USER: Hello. I am Dennis Martin.

ASSISTANT: Hello, how can I aid you?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: We found a reservation on your name, as per your request your reservation has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.