customer: Hello. 
 agent: Hello. 
 customer: I am Brian Collins. 
 agent: How can I help you at this moment? 
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 agent: Sure, can you please provide your travel dates? 
 customer: Ok, my trip date is on 05/16 and return date is 05/18. 
 agent: Wait a moment please. 
 customer: Ok, I will wait. 
 agent: Brian Collins, there are no flight services available on this route on your provided dates. 
 customer: That's ok, thank you for assisting me. 
 agent: Thank you for contacting us.
customer: Can you help me to book a flight ticket from ORD to DFW?