You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a conference, can you please book the ticket from BOS to LAX?

ASSISTANT: Can I have your trip dates?

USER: Sure, my planned departure and return travel dates are 18th and 20th of June.

ASSISTANT: Do you need any connection limit?

USER: I prefer single connected flight to travel.

ASSISTANT: Do you need any other specifications?

USER: I don't have any other specifications.

ASSISTANT: May I know your name?

USER: My name is Pamela Williams.

ASSISTANT: Sorry, there are no flights available on your routes.

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

ASSISTANT: Thank you for choosing us.