You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: Please help me in booking the ticket from AUS to IAD, to attend a sports event in Washington.

ASSISTANT: Ok, on which dates do you want to travel?

USER: I would like to travel on the dates of 04/02 to 04/04.

ASSISTANT: Ok, please wait a moment to check the flights availability and I will get back to you.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no flights available for you now, you might please try after some days.

USER: Ok, no problem.

ASSISTANT: Would you like to ask us anything else?

USER: No, thanks for your help.

ASSISTANT: Thank you for using our service, have a nice day.

USER: Welcome.

ASSISTANT: May I know your name please?

USER: My name is Jessica Brown.

ASSISTANT: Ok Brown, thank you.