You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need a direct flight to Washington, As I am a journalist I want to collect some data from library of congress. Can you do the reservation?

ASSISTANT: OK, may I know your boarding and deboarding points?

USER: My airport codes are AUS-IAD.

ASSISTANT: Help me with your travel dates?

USER: Dates are 08/25 and 08/27.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no  direct flights are available on your requested dates. May I know your name?

USER: No problem, Thank you. Robert Clark here.

ASSISTANT: Thank you for availing us.