You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I want to visit Phoenix, can you please book the ticket from BOS to PHX?

ASSISTANT: Sure, can I know your good name please?

USER: Sure, my name is Shirley Lopez.

ASSISTANT:  When you are willing to travel?

USER: My planned departure and return travel dates are 15th and 17th of Sept.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer single connected flight to travel.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: Yes, I want to return on the evening time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for choosing us.