You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Wilson.

ASSISTANT: How may I help you?

USER: I would like to change my reservation as I am leaving for business trip, can you please help me out?

ASSISTANT: Sure, please give me a moment to check it.

USER: Thank you.

ASSISTANT: Thank you for waiting, there is no reservation status found on the name which you have given to modify.

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

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