You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please book a flight ticket from AUS to DCA?

ASSISTANT: Can you share your trip dates?

USER: My trip dates are July 01 and July 03.

ASSISTANT: Do you need any connections?

USER: I need a single connecting flight.

ASSISTANT: Are there any other preferences?

USER: I want to return in the evening.

ASSISTANT: May I know your name?

USER: My name is Rebecca Hernandez.

ASSISTANT: Sorry, there is no flight found with your details.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.