You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: This is Sandra Martinez, looking for your help.

ASSISTANT: How may I render you at this moment?

USER: I need to visit the White house, to attend the president inauguration speech, at Washington. Can you help me in booking a ticket with connecting flight?

ASSISTANT: Sure, Could you please share your corresponding airports?

USER: I want to board from Atlanta International airport, ATL which is nearest for my hometown. I will land on DCA.

ASSISTANT: Ok, may I know your preferred travelling dates?

USER: My preferable travel dates are 06/30 and 07/02.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure, make it as fast as you can.

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

USER: That's ok, thanks for your kind information.

ASSISTANT: Thank you for reaching us.