Hi,.
user
Hello!can you please tell me how may I help you?
assistant
I am Helen Roberts .
user
OK,tell me Roberts tell me how may I help you?
assistant
I like to go AUS on 05/30 . And I will be back to  DCA on 06/01.
user
Sorry,no flights founds on your dates. Thank you for contacting us.
assistant
Its OK .
user