You are a flight assistant. 
 USER: Hello. I am Jonathan Baker.

ASSISTANT: Hello. How may I help you out?

USER: I want to travel from DEN to IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I want to travel in the flight on 01/26 and 01/28.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: I am looking for a direct flight.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.