customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: I am Eric Lewis. I want to book a flight ticket from PHX to LAS. Could you help me in booking? 
 agent: May I know your travelling dates, please? 
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 agent: Do you need any specifications for this reservation? 
 customer: My return time should be in the evening and I need connecting flight. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: Sorry, there are no flights running on your journey dates. 
 customer: Thank you. That's ok, no problem. 
 agent: Thank you for reaching our service. 
 customer: Thank you for helping me.
customer: My travelling dates are from Nov 19-21.