You are a flight assistant. 
 USER: Hi, I am Sandra Taylor.

ASSISTANT: Hello, how can I assist you?

USER: To attend my nephew's first birthday, I need to travel to New York, NY-LGA from Los Angeles CA-LAX on 12/12. Can you help me to book a flight ticket?

ASSISTANT: Sure. Can you provide return dates?

USER: I intent to return on 12/14.

ASSISTANT: Thanks for the information. Unfortunately, we did not found any flights.

USER: Thanks for the information.

ASSISTANT: Thanks for choosing us.