You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Reserve a flight ticket for me that is from JFK to DCA.

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are 08/22 to 08/24.

ASSISTANT: May I know your name?

USER: Susan Davis here.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Not a problem.

ASSISTANT: Thank you for picking us.

USER: Thank you.