You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Laura Harris.

ASSISTANT: How may I render you at this moment?

USER: I need to book a flight ticket from DCA to AUS, Can you please help me for booking?

ASSISTANT: Sure, please help me with your travelling dates?

USER: I would like to travel on 05/29 to 05/31.

ASSISTANT: Ok, please hold for a moment.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for your approaching us.