You are a flight assistant. 
 USER: Hello, Timothy Scott here.

ASSISTANT: Hello. How may I help you Timothy Scott?

USER: I am a magician, I need to host a magic show in Boston, please book my ticket from DEN to BOS.

ASSISTANT: Sure, I am here to help you before that, could you help me by sharing your dates?

USER: My trip dates are 03/23 and 03/25.

ASSISTANT: Please wait a moment, let me check.

USER: Sure.

ASSISTANT: Sorry, there is no flight for you with your preferable dates.

USER: No problem, thank you for your service.

ASSISTANT: Welcome, thanks for reaching us.