You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you? I am happy to help you with your concern.

USER: I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My travelling dates are Jan 07 and Jan 09.

ASSISTANT: May I ask for your region airport codes for booking flight ticket?

USER: My airport codes are PHX and DCA.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I prefer single connecting flight.

ASSISTANT: Do you prefer economy class flight or business class flight?

USER: I don't have any other preferences.

ASSISTANT: Thank you for confirming. If you can help me with your name, I can proceed further to check with the flight availability.

USER: My name is Elizabeth Jackson.

ASSISTANT: Please bear with me 2-3 minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, Elizabeth Jackson.

USER: My pleasure.

ASSISTANT: Sorry for the inconvenience, Elizabeth Jackson. I am afraid that there are no flights available for the mentioned dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching our service!.