customer: Hello. I am Edward Hall. 
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 customer: I would like to travel from LGA to IAH, can you help me to book a flight ticket? 
 agent: Sure, could you please provide your travelling dates to search for the flight? 
 customer: My preferable journey dates are May 10 and May 12. 
 agent: Do you have any requirements? 
 customer: I would like to depart in the evening time. 
 agent: May I know your other specifications? 
 customer: I prefer connecting flight. 
 agent: Sorry to say, no flight is available for you. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.
agent: Hello, how may I help you?