customer: Hello. 
 agent: Hello. How can I aid you today? 
 customer: Christine Young here. I am looking for a flight from DCA to SEA, can you flight it for me? 
 __ 
 customer: My travel dates are from 09/16 till 09/18. 
 agent: Ok, wait for a minute. 
 customer: Make sure that the connection limit should be 1. 
 agent: Sorry Young, there are no flight's available based on your travelling dates. 
 customer: That's ok, no problem. 
 agent: Thank you for contacting  us. 
 customer: Thank you for your help.
agent: Sure, I am happy to help you. May I know your preferable dates?