You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a flight ticket to visit NASA Space Center at Houston, can you help me with booking?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My journey dates are July 31 and Aug 02.

ASSISTANT: Please mention your airport codes?

USER: I will fly from DEN my nearest airport to reach IAH.

ASSISTANT: Do you like to travel in connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other requirement related to booking?

USER: No.

ASSISTANT: May I know your name?

USER: I am Elizabeth Wilson.

ASSISTANT: I found a direct flight 1000 of airline Frontier, fare is 200 and class is economy. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.