customer: Hello. 
 agent: Hello. How can I assist you at this moment? 
 customer: My name is Michelle Johnson, I want to book a direct flight ticket to attend a meeting in DFW, can you help me with booking? 
 agent: Sure, I am here to help you. Could you please provide your journey dates? 
 customer: Thank you. My journey dates are Nov 22 and Nov 24. 
 agent: May I know your source airport code? 
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 agent: Do you have any specific depart and arrival timings for this trip? 
 customer: My return time is afternoon. 
 agent: Do you have any other specifications for this trip? 
 customer: No. 
 agent: Michelle Johnson, there are no direct flight services are available on this route on your provided dates. 
 customer: Ok, no issues. Thank you. 
 agent: Thank you for contacting us.
customer: My source airport code is IAD.