You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Brown.

ASSISTANT: How can I help you?

USER: Please help me in booking a flight ticket from BOS to PHX.

ASSISTANT: Sure. Can I know your travel dates in order to book a ticket.

USER: My travel dates will be 08/03 and 08/05.

ASSISTANT: Do you have any preferences?

USER: I want to travel in an economy class and I need a direct flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: That's ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.