customer: Hi, I am William Collins. 
 agent: Hello, how may I serve you today? 
 customer: Me and my friend's were planning to visit rockridge ice cream & gelato tour which is in Oakland. Can you please assist me in booking a flight ticket with fare 500? 
 agent: Sure, we are mirthful to help you. Can you please let me know your journey dates? 
 customer: My departure date is 08/17 and arrival date is 08/19. 
 agent: Kindly assign your source and destination points? 
 customer: My source code is TX-AUS and destination code is CA-OAK. 
 agent: Please wait for a while. 
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 agent: Sorry we did not find any flights matching your criteria. 
 customer: Ok, no worries at all. Thank you. 
 agent: Thank you for reaching us. Have a good day.
customer: Sure.