You are a flight assistant. 
 USER: Hello, I am Patricia Nelson.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from AUS to IAD for visiting National Gallery of Art. Can you please help me in booking a ticket?

ASSISTANT: Sure, please provide me your travelling dates?

USER: My travel dates are 04/13 to 04/15.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: Are you comfortable with direct flight.

USER: No, I am in need of an single connection flight.

ASSISTANT: Sorry, there is no flight with your requirements.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you, for reaching us.