You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to book a ticket, could you please help me in booking?

ASSISTANT: Sure, I can help you in that. Can I have your details of travelling?

USER: Sure. I want to travel from CA-LAX to MA-BOS.

ASSISTANT: OK, Can I know your preferable dates?

USER: My dates are 04/01 and 04/0. 03.

ASSISTANT: OK, before proceeding will you provide your name for booking?

USER: I am Donna Wilson.

ASSISTANT: Sorry Donna, there is no airlines that are going to your destination.

USER: OK fine. Thanking you for your valuable information.

ASSISTANT: It's our pleasure to serve you.