customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I am Emma Baker, I would like to travel to San Francisco, SFO. So will you help me to reserve a flight ticket? 
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 customer: I am located in New York, the airport I prefer is LGA. 
 agent: Emma, when are you planning your journey? 
 customer: I planned to travel on 01/11 and the return might be on 01/13. 
 agent: Emma, there are no flights available at this moment. 
 customer: It's ok, thank you for searching. 
 agent: Thank you for reaching us. 
 customer: You are welcome.
agent: Sure. May I know your source airport code please?