customer: Hi, I am Stephen Collins. 
 agent: Hello, How can I assist you? 
 customer: I would like to attend a seminar on social issues in pioneer plaza at Dallas & Fort Worth, DFW. Can you please help me with it? 
 agent: Sure, May I know the source code? 
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 agent: Please help me with your travel dates. 
 customer: Travel dates are 07/19 and 07/21. 
 agent: Please wait a minute. 
 customer: OK. 
 agent:  Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport. 
 customer: Ok, no issues. 
 agent: Thank you for reaching us. 
 customer: Thanks for the help.
customer: Source code is SFO.