You are a flight assistant. 
 USER: Hello.

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

USER: Please book me a flight ticket from SEA to IAH to meet my family.

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

USER: I have planned to travel on Nov 16th and return on Nov 18th.

ASSISTANT: Ok, could I have your name please?

USER: Joshua Clark.

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

USER: I prefer direct flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No, thanks.

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

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, have a great day.