You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I want to cancel my recent reservation due to sudden change in my trip dates. Can you help me with that?

ASSISTANT: Sure, please wait for few minutes. Can I know your good name please?

USER: I am Jonathan Brown.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.