customer: Hi. 
 agent: Hello. 
 customer: My name is Dennis Collins. 
 agent: How may I assist you today? 
 customer: I'm planning a trip to Lake Austin in AUS with my friends, can you book a ticket from IAD? 
 agent: Sure, I will help you Dennis. May I know on which dates you planned to travel? 
 customer: The travel dates are from 03/31 to 04/02. 
 agent: Ok, please wait a moment to check the availability of flight and I will get back to you. 
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 agent: Sorry for the inconvenience, no flights available as per your requested dates. 
 customer: No problem, thank you for your help. 
 agent: Thank you for contacting us, have a good day.
customer: Ok.