You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Frank Mitchell. Can you please help me with changing my recent reservation?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No problem, thanks for the information.

ASSISTANT: Thank you.