You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I give assistance to you?

USER: I want to change my reservation as my meeting with share holders is postponed. can you help me to change my reservation?

ASSISTANT: Sure, we are glad to help you to change. May I know your name?

USER: Sure, my name is Joshua Baker.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There was no reservation found on your name.

USER: That's Ok. Thanks for your kind service.

ASSISTANT: Thank you for approaching us.