customer: Hello. 
 agent: Hello. What can I do for you? 
 customer: Dorothy Roberts here. I would like to visit space centre which in Houston, can you book the ticket for me? 
 agent: Dorothy can you tell me your journey dates? 
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 agent: Provide me your airport codes? 
 customer: My location codes are from LGA to IAH. Make sure that the connection limit should be 1. 
 agent: No flights were found by your name. Can I help you with anything else? No flights were found by your requirement. 
 customer: That's ok. Thank you for your information. 
 agent: You are welcome.
customer: My travelling dates will be from 12/29 till 12/31.