Hello.
Hello, how may I assist you?
 As I am a scientist, I want to attend science festival with my students at Washington. Can you help me to book a ticket from PHX to DCA?
Sure, may I know your planned travel dates please?
My journey dates are 09/10 and 09/12.
Please wait for a moment.
Sure.
Sorry, there is no flight available on your requested dates.
No problem, Thanks for the information.
May I know your good name please?
Mark Lopez here.
Thank you.