You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I want to travel in the flight on Jan 17 and Jan 19.

ASSISTANT: Ok, could I have your name please?

USER: I am Emily Moore.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am looking for a direct flight.

ASSISTANT: Ok, may I know your departure and arrival time?

USER: I don't have any.

ASSISTANT: Sorry, there is no flight with your requested connection limit.

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

ASSISTANT: You are welcome, have a great day.