You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: I am Melissa Garcia.

ASSISTANT: Ok, how can I help you at present?

USER: I heard that New York is the best place to learn new stories. So, can you help me in booking a direct flight?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: My journey dates are from 02/02 to 02/04.

ASSISTANT: Kindly please ensure your airport abbreviates of your source and destination?

USER: My airport codes are from ATL to LGA.

ASSISTANT: Sorry to say this, no flights are available for you.

USER: Not an issue. Thank you for your help.

ASSISTANT: Thanks for reaching us, have a nice day.