customer: Hi, I am Anna Anderson. 
 agent: Hello. How may I support you today? 
 customer: Please book me a ticket with price under 500. 
 agent: Sure, for that I need to know your travelling dates. Can you provide it? 
 customer: My departure is 04/22 and arrival is on 04/24. 
 agent: Is there any connection preference? 
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 agent: Could you please let me know your airport codes? 
 customer: I am participating us Nutshell Biking tour in Austin, TX - AUS so I am heading from Charlotte, NC - CLT. 
 agent: Please wait a moment I will check and revert to you. 
 customer: Ok. 
 agent: Thanks for waiting, we are unable to provide best flights for you due to terminal up gradation at your destination airport. 
 customer: Ok fine. 
 agent: Thanks for reaching us, have a nice day. 
 customer: Thanks for your assistance.
customer: Yes, I need a halt.