You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel from DCA to AUS, can you please reserve a flight ticket between those locations?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: Thank you, my boarding is on June 12 and please book my return ticket on June 14.

ASSISTANT: How many connections do you need?

USER: I would prefer single connection for my journey.

ASSISTANT: Any other requirements to be met?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Emily Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Oh! Sad to hear that. Anyway, I will find another alternative.

ASSISTANT: Thank you for opting us.

USER: Thank you for the information.