You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER:  Could you book a ticket from SEA to BOS?

ASSISTANT: Sure.Can you share the trip dates please?

USER: My trip dates are 08/11 and 08/13. Thomas Carter here.

ASSISTANT: Carter, there are no flights as per your request.

USER: You can proceed.

ASSISTANT: You are welcome.