You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Roberts.

ASSISTANT: How may I aid you today?

USER: I would like to cancel my recent reservation because of some personal work, can you help me to cancel my flight reservation?

ASSISTANT: Sure, I am happy to help you with that. Can you please wait for a while.

USER: Thank you for quick response. Sure, take your own time.

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

USER: That's fine, not an issue. Anyways thanks for your help.

ASSISTANT: Thank you for reaching us.