You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to book a ticket from HOU to BOS, can you please help me with that?

ASSISTANT: May I know your travelling dates please?

USER: The travel dates are from 09/15 to 09/17.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with 1 connection limit.

ASSISTANT: Is there any specification?

USER: I would like to return during evening time in normal cost airline.

ASSISTANT: May I know your name please?

USER: Raymond Lewis here.

ASSISTANT: I am sorry no flights found on your route.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.