You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Benjamin Anderson here. I am looking for a flight from HOU to IAH, can you help me?

ASSISTANT: May I know your desired travel dates please?

USER: I want to fly on 11 Oct and return on 13 Oct.

ASSISTANT: Do you have any specifications?

USER: My depart time should be in the afternoon and return time should be in the evening.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for opting us.