You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Adams.

ASSISTANT: How can I help you now?

USER: I am planning to travel from HOU to BOS, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my travelling dates are Sept 29 and Oct 01.

ASSISTANT: Let me know about your connection limit.

USER: I need a single connection flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know about your other specifications, if any?

USER: My departing time is evening and my return time is morning.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Sorry to say that, there are no flights available as per our database.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.