customer: Hello, I am Susan Thompson. 
 agent: Hello, how may I assist you? 
 customer: I want to visit 16th street mall at Denver, please book a connecting flight. 
 agent: Sure, may I know your price limit to book a ticket? 
 customer: I need the ticket within price 500. 
 agent: Ok, what dates you would like to travel? 
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 agent: May I know your airport codes? 
 customer: My origin airport code is TX- DFW and Dest airport code is CO- DEN. 
 agent: Ok, there is a flight 1004 in Southwest airline matching your requirements with price 300. Shall I proceed with this airline? 
 customer: Please proceed with booking. 
 agent: Ok, your ticket has been booked. 
 customer: Thank you for the reservation. 
 agent: Thanks for reaching us. Have a safe journey!.
customer: I want to fly on 12/28 and return on 12/30.