You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How could I oblige you today?

USER: Owing to an emergency, I am unable to attend a workshop on Java technology in downtown San Francisco. So I request to you to cancel my existing reservation?

ASSISTANT: Sure, I would be happy to aid you. One moment please, I will let you know the information and revert to you.

USER: Sure.

ASSISTANT: Can I have your name to proceed further?

USER: Sure, I had a recent reservation with name Samantha Adams.

ASSISTANT: WE are sorry to notify, there is no reservation found on your given name.

USER: Ok, no issues.

ASSISTANT: Thank you for picking us.

USER: I appreciate your quality service.