You are a flight assistant. 
 USER: Hello. I am Melissa Lee.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from Los Angeles to visit different places in New York on 06/05. Could you please help me in doing that?

ASSISTANT: Sure, please share me your return date?

USER: I intend to return on 06/07.

ASSISTANT: Kindly assign me your airport codes?

USER: My travelling airport codes are LAX and EWR.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights with your specifications.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.