You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your planned trip dates?

USER: My trip dates are 04/19 and 04/21.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable to travel in a single connecting flight.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: May I know your good name?

USER: Ryan Lopez here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.