You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jack Evans here.

ASSISTANT: Jack, how can I assist you?

USER: I would like to visit Washington for a business meeting, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, please share your airport codes.

USER: I want to travel from DEN to DCA.

ASSISTANT: May I know your itinerary dates?

USER: Sure, I am planning to go on 08/06 and please book a return ticket on 08/08.

ASSISTANT: Please hold on for a while.

USER: Sure, take your time.

ASSISTANT: Direct flight is available by Southwest airlines, are you comfortable with it?

USER: Sorry, I need a flight with 1 connection, can you please check for it?

ASSISTANT: Let me check. Sorry, no flight is available with 1 connection.

USER: Oh! So sad to hear. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us.