You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to travel from SFO to BOS. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: I want to fly in the flight on June 12 and June 14.

ASSISTANT: Do you have any connection limit?

USER: I want to travel in a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other requirements?

USER: No.

ASSISTANT: Please forward your name.

USER: Janet Lee.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.