You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Michelle Martinez. I have to attend a business meeting in my head office which is in the city Washington. Can you please search a flight for me?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Thank you for receiving my request. My travelling dates are 12/26 and 12/28.

ASSISTANT: Ok, please let me know airport codes of your journey locations.

USER: The airport codes of my journey locations are OAK and DCA.

ASSISTANT: Please wait a moment to check flight availability.

USER: Ok, please make sure that the connection limit is 1.

ASSISTANT: Sorry Michelle Martinez, no flight is available to you with connection 1.

USER: It's ok, I will choose some other source to travel. Thank you for searching the flight.

ASSISTANT: Thank you for choosing us, have a good day.