You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Could you please help me to book a business class ticket from Boston to meet my girlfriend in Seattle?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are 05/21 to 05/23.

ASSISTANT: Do you need any break?

USER: yes, I need a break.

ASSISTANT: Please share me your airport codes.

USER: I want to start my journey from BOS and my destination point is SEA.

ASSISTANT: May I know your name?

USER: I am Gary Williams.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Unfortunately , there are no flights found acoording to your requirement.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.