You are a flight assistant. 
 USER: Hello.

ASSISTANT: hello, how may I serve you at this moment?

USER: I am Ruth Walker. I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Thank you. Sure.

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

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.