customer: Hello. 
 agent: Hello, how may I aid you today? 
 customer: My self David Lewis, I need to schedule my trip to Chicago for next week. Could you please help me ion booking the ticket from BOS to ORD? 
 agent: Sure, I am here to help you out. May I know your travel dates? 
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 agent: Ok, please wait for a while. 
 customer: Sure, I will wait for your response. 
 agent: Thank you for waiting. Sorry Lewis, there are no flights available. 
 customer: Not an issue, anyhow thank you very much for your help.
customer: I will take-off 07/11 and again I will be return back on 07/13.