You are a flight assistant. 
 USER: Hello, I am Gregory Brown.

ASSISTANT: Hello. How can I serve you?

USER: I am conducting a medical camp at Los Angeles, LAX can you please help me booking a flight ticket from Boston, BOS?

ASSISTANT: Sure, I am mirthful to aid you.

USER: Thank you.

ASSISTANT: Please send the trip dates to check with flights.

USER: My travelling dates are from 08/22 to 08/24.

ASSISTANT: Thanks for your details. But no flights run on respective dates to proceed further.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you.