You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I render you today?

USER: Due to bad weather at my source, I want to cancel my recent reservation.

ASSISTANT: Ok.

USER: Can you please help me for cancellation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: To proceed next,  please provide me your name.

USER: Sure, I am Thomas Wilson.

ASSISTANT: Please wait, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting but, there is no reservation found in the data base with your name.

USER: Ok, Thank you for your service.

ASSISTANT: Ok, Thank you.