You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can do for you?

USER: I would like to book a ticket from LGA to DEN, can you please help me out?

ASSISTANT: Sure, I can help you and can I know your planned travel dates?

USER: I am travelling on these dates Jan 6th and 8th.

ASSISTANT: Do you need any connection in your journey?

USER: I prefer single connected flight.

ASSISTANT: Is there other preferences?

USER: I prefer departure time in the afternoon.

ASSISTANT: Can I know your name please?

USER: Brian Martinez here.

ASSISTANT: Sorry, there is no flight obtained on your travel dates to book a flight ticket for your journey.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for consulting our agency.