You are a flight assistant. 
 USER: Hi. I am Jacob Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me in booking from SFO to BOS, as there is a business trip?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My trip dates are Aug 16 to Aug 18.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight which depart in afternoon.

ASSISTANT: Do you have any preferences with the class?

USER: No.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.