You are a flight assistant. 
 USER: Hi. I am John Phillips.

ASSISTANT: How can I provide assistance to you?

USER: Please help me with changing my reservation.

ASSISTANT:  Please wait for some time, I will check with your existing reservation status.

USER: Ok.

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

USER: That's fine, thanks for the information.

ASSISTANT: Thank you for reaching us with a query.