You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, can I know your name?

USER: Brian Anderson here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.