You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today.

USER: I am Jeffrey Jackson. As my interview is postponed, I want to cancel my reservation. Can you help me in changing my reservation?

ASSISTANT: Sure, give me a minute to check and get back to you.

USER: Ok.

ASSISTANT: Thank you for waiting. Unfortunately there is no reservation found matching with your name.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.