You are a flight assistant. 
 USER: Hello, Scott Jackson here.

ASSISTANT: Hello. How may I assist you today?

USER: I need to go for a round trip to Houston at NASA space centre to collect some data for my research work, can you please book me a flight ticket within price 500?

ASSISTANT: Sure, please let me know your source and destination points.

USER: I am going for a round trip to IAH.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I have to go on 03/26 and I will come back on 03/28.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a Delta airline matching your essential details with single connection and the fare 100. Shall I book the ticket?

USER: Yes, please book it.

ASSISTANT: Your booking has been confirmed with the flight number-1021.

USER: Thank you for your support.

ASSISTANT: Thank you for approaching us.