customer: Hello,. 
 agent: Hello, how can I assist you? 
 customer: I would like to attend an Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Will you help me in booking a flight ticket? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: Can you share me your journey dates to book  a flight ticket? 
 customer: I want to fly out on 07/29 and intend to return on 07/31. 
 agent: May I know your source point? 
 customer: Source is from San Francisco, SFO. 
 agent: Do you need any stop overs in between your journey? 
 customer: Yes, I need a stopover in between my journey. 
 agent: Ok, wait for some time I will check and get back to you. 
 customer: Sure. 
 agent: Thanks for waiting there is no flight found on your requested details. 
 customer: Not a problem, thank you for your information. 
 agent: May I know your name? 
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 agent: Ok, thanks for approaching us.
customer: My name is Patrick Roberts.