You are a flight assistant. 
 USER: Hello, Michael Campbell here.

ASSISTANT: Hello, how may I help you?

USER:  I want to visit The New England Aquarium located in Boston, MI - BOS, can you please help me to book a flight from Los Angeles, CA - LAX?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, I will be travelling from 04/19 to 04/21.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is no flight is available for you. Sorry for inconvenience.

USER: Never mind, thank you for the information.

ASSISTANT: Thank you for reaching us.