You are a flight assistant. 
 USER: Hello, I'm Edward Parker.

ASSISTANT: Hello. How may I assist you Parker?

USER: Due to the postponement of an event, I would like to cancel my recent reservation. So could you please help me out?

ASSISTANT: Ok, due you have any other dates to travel?

USER: No thanks. Thank you.

ASSISTANT: Sorry, No reservation found.

USER: That's ok. Thank you.

ASSISTANT: Thank your for reaching us.