You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want your help in making some changes in my existing reservation due to the busy schedule on my previously planned dates. Can you please help me in that?

ASSISTANT: Sure. May I know your name?

USER: Patrick Hall here.

ASSISTANT: Please wait.

USER: Sure.

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

USER: Ok, Not a single problem. Thank you.

ASSISTANT: Thank you.