You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jacob Allen.

ASSISTANT: Ok.

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you please help me that?

ASSISTANT: Sure, I am here to help you. Please wait for some time, I will check with your existing reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting.

USER: No problem.

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

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for reaching us, have a nice day.