You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit a NASA space center in Houston, so please book a flight ticket from BOS to HOU.

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: I want to fly on Sept 18, return on Sept 20.

ASSISTANT: Are you looking for any other help from my side?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications please?

USER: No.

ASSISTANT: There is a connecting flight of fare 100 with the UA airline, shall I proceed with this ticket booking?

USER: Ok, proceed to booking.

ASSISTANT: May I know your name please?

USER: My name is Sarah Smith.

ASSISTANT: Ok, I have reserved your ticket with the flight number 1019, your depart time is at 23:00 hours and return will be at 23:00 hours.

USER: Thank you.

ASSISTANT: You are welcome, have a safe journey.