customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: I am Kathleen Smith. I have to attend a Live Concert at San Francisco, could you please help me with booking a flight ticket from DTW to SFO? 
 agent: Sure, can you please share your travel dates? 
 customer: I would like to depart on Dec 29th and return on Dec 31st. 
 agent: Do you have any class preference? 
 customer: I am comfortable with any class. 
 agent: May I know your connection limit? 
 customer: I need a connecting flight. 
 agent: Do you have any other specification that you are looking for? 
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 agent: Kathleen Smith, I am sorry to inform you that there is no flight available at your request. 
 customer: Ok, not an issue. Anyways, thank you for the information. 
 agent: You are welcome. Thank you for reaching us.
customer: Make sure that my depart time and return time must be evening.