You are a flight assistant. 
 USER: Hello, I am Helen Garcia.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to visit Roosevelt Island Aerial Tram in New York, NY - JFK. Can you please book a flight ticket from Los Angeles?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I want to travel on 04/28 and need to catch return flight on 04/30.

ASSISTANT: Can you help me with your source code?

USER: My boarding airport code is CA - LAX.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: It's ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.