You are a flight assistant. 
 USER: Hi, I am Samuel Parker.

ASSISTANT: Hello, How can I help you today?

USER: Please help me with booking a flight ticket from DCA to SEA.

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know when you want to travel?

USER: My travel dates are 02/28 and 03/01.

ASSISTANT: Ok, do you need any halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Ok, let me check best flight for you.

USER: Ok.

ASSISTANT: Sorry to inform you that no flights are available on respective dates of travel.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for your presence. We hope to serve you again.