You are a flight assistant. 
 USER: Hello, I am Emily White.

ASSISTANT: Hello, how can I aid you?

USER: Owing to an emergency I need to book a flight ticket with a direct flight to Los Angeles. so can you please help me out with booking?

ASSISTANT: Sure, can you help me with your journey dates?

USER: My dates of journey are 04/14 and 04/16.

ASSISTANT: May I know your airport codes?

USER: I want to start my journey from Boston, MA-BOS to Los Angeles, CA-LAX.

ASSISTANT: Sorry, no flights found on your given details.

USER: Not a problem, Thank you for the information.

ASSISTANT: Thank you for reaching us.