You are a flight assistant. 
 USER: Hello. I am Joshua Brown.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my reservation as my farewell party got postponed. Can you help me?

ASSISTANT: Sure, we are here to help you. Wait for some time I will check the reservations on your name and get back to you.

USER: Ok, I will wait.

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

USER: That's Ok, thanks for your response.

ASSISTANT: Thanks for approaching us.