You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jack Lewis here.

ASSISTANT: How may I assist you for the day?

USER: I need to cancel my previous reservation. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your  good name please?

USER: I have already mentioned.

ASSISTANT: Ok, please wait a while.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: It's ok fine. Thank you for the information.

ASSISTANT: Thank you for reaching us,have a nice day.