You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to make a reservation from BOS to LAX?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are on Jan 21 and Jan 23.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a direct flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: My name is Patrick Hall.

ASSISTANT: There is no flights found under your preferable details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Welcome, have a great day.