You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello!can you please tell me how may I help you?

USER: I am Helen Roberts .

ASSISTANT: OK,tell me Roberts tell me how may I help you?

USER: I like to go AUS on 05/30 . And I will be back to  DCA on 06/01.

ASSISTANT: Sorry,no flights founds on your dates. Thank you for contacting us.

USER: Its OK .