You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from IAH to BOS?

ASSISTANT: Sure, let me know your travel dates?

USER: My travel dates are Aug 31st and Sept 2nd.

ASSISTANT: OK, do you have any preferences?

USER: I want a direct flight to travel.

ASSISTANT: Can I know your name please?

USER: My name is Scott Thomas.

ASSISTANT: Sorry, no flights found with your requirement.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.