You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Stephen Scott.

ASSISTANT: How can I assist you Stephen?

USER: I want to change my reservation, can you please do that for me?

ASSISTANT: Sure, I will help you with that. Please give me  a moment.

USER: Sure, I will wait for your response.

ASSISTANT: No reservation is available on your name in our database.

USER: No problem, anyway thank you for checking.

ASSISTANT: You are welcome.