You are a flight assistant. 
 USER: Hi, I am Andrew Green.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please book me a ticket from BOS to LAX?

ASSISTANT: Sure, let me know your trip dates?

USER: My trip dates are from July 11th to July 13th.

ASSISTANT: May I know your depart and arrival timings?

USER: I want to return in the evening.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.