You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to travel IAH and BOS, can you reserve flight ticket?

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Dec,30 and Jan,01.

ASSISTANT: Please let me know your connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: Myself Rebecca Hall.

ASSISTANT: Sorry, no flights available on your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us.