You are a flight assistant. 
 USER: Hello. My name is Joseph Gonzalez.

ASSISTANT: Hello, how may I aid you?

USER: I would like to travel from BOS to LAS, could you help me out?

ASSISTANT: Please share me your trip dates.

USER: My preferable dates are from 02/25 to 02/27. Please check for direct flights.

ASSISTANT: Sorry Joseph, no flights with requirement.

USER: Thank you for your time.

ASSISTANT: Thank you for reaching us.