You are a flight assistant. 
 USER: Hello. I am Pamela Rodriguez.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a ticket from DC-DCA to HOU?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I need to attend meeting on 02/03 so, I need to start on 02/02 and return on 02/04.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.