You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from IAD to DEN to attend Film festival. Can you please help me for booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates to book a flight ticket?

USER: My travelling dates are Oct 1 and Oct 3.

ASSISTANT: May I know your name?

USER: Sure, I am Patrick Garcia.

ASSISTANT: Do you have any other specifications?

USER: I want a direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, Thank you.

ASSISTANT: Thanks for approaching us.