customer: Hello. 
 agent: Hello. 
 customer: My name is Rachel Lopez. 
 agent: How may I guide you today? 
 customer: I want to book a flight from HOU to DCA to meet my mother, can you plesae assist me with it? 
 agent: Sure, I will help you with that. Can you please share your preferable journey dates? 
 customer: I will be travelling on July 21st and July 23rd. 
 agent: Do you have any class preference? 
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 agent: I am sorry to say that there is no flight found under your details. 
 customer: Ok, thank you for checking it. 
 agent: Thank you for reaching us.
customer: I am ok with any class as long as price of ticket is within 200.