You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to sudden work at my office, I am unable to travel now. Can you please cancel my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Jerry Adams.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, there are no active reservations to cancel.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching our service.