You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jessica Walker. Due to sudden change in the dates of summit which was going to be held in the place,so  I want to cancel my recent reservation, can you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Walker, there is reservation found as per your name.

USER: It's ok. Thank you for your help.

ASSISTANT: Shall I proceed to cancel your reservation? Ok.

USER: Please proceed.

ASSISTANT: Sure, your reservation has been cancelled.

USER: Thank you for your service.

ASSISTANT: You are welcome.