customer: Hello, I am Donna Anderson. 
 agent: Hello, how may I aid you at this moment? 
 customer: I would like to go to Space Needle in Seattle, so could you please book a ticket for me? 
 agent: Sure, I will help you. Can you please share your travelling dates? 
 customer: Sure, I would like to go on 12/02 and return back on 12/04. 
 agent: Please provide your nearby airport codes. 
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 agent: Noted. Please wait for a while. 
 customer: Ok, ensure it is a single connecting flight. 
 agent: There is a connecting flight available with UA airline, shall I book it? 
 customer: Ok, please proceed for further if it costs you below 1000. 
 agent: Your booking is done with flight number 1023. Happy journey. 
 customer: Thank you for booking. 
 agent: You are welcome. Thank you for reaching us, have a nice day. 
 customer: Welcome.
customer: My source and destination airport codes are SFO and SEA.