customer: Hello, I am Betty Green. 
 agent: Hello, how may I serve you at this moment? 
 customer: Can you aid me in booking a flight ticket from LAX to DTW in a single connecting flight? 
 agent: Sure, I will help you. Please send your travelling dates. 
 customer: Sure, I would like to go on June 21st and return back on June 23rd. 
 agent: Do you have any preferences? 
 customer: Ensure the depart time should be in the morning. 
 agent: Sorry, there is no flight available on your requested time. 
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 agent: You are welcome, have a nice day.
customer: That's ok, thank you for checking.