You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kathleen Davis. I am planning to visit Space centre in Houston, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travelling dates are from 05/18 till 05/20.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are from DEN to HOU.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: In my search, I found a flight for you with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked with flight number 1020 and airline is Southwest.

USER: Thank you for booking.

ASSISTANT: Welcome, have a safe flight.