You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from DCA to AUS to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I am departing on May 07 and return on May 09.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Is there any class preference?

USER: I do not have any class preference.

ASSISTANT: May I know your arrival and depart timings?

USER: I am ok with any time.

ASSISTANT: Do you have any other specifications?

USER: I do not have any other specifications.

ASSISTANT: Please forward your name.

USER: My name is Edwards Wright.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for availing us.