customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: Please help me to book a flight ticket from LGA to IAD? 
 agent: May I know your planned dates to travel? 
 customer: My travelling dates are Apr 18 to Apr 20. 
 agent: Is there any connection limit? 
 customer: I need a single connection of flight. 
 agent: May I know your good name? 
 customer: William Jackson here. 
 agent: Do you have any other requirements? 
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 agent: Sorry, there were no flights found with your required dates to travel. 
 customer: It's ok, thank you. 
 agent: Thank you for choosing us.
customer: No.