You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a ticket from New York to Seattle.

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

USER: My travelling dates are May, 19 and May, 21.

ASSISTANT: Please provide your airport codes.

USER: Sure. My airport codes are LGA and SEA.

ASSISTANT: Do you have any preferences about flight connections?

USER: I prefer connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: I would like to prefer business class.

ASSISTANT: Please mention your name.

USER: I am Rachel Hernandez.

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

USER: Thank you.

ASSISTANT: Welcome, have a great day.