You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Robert Thomas here.

ASSISTANT: Glad to meet you, Robert.

USER: I would  like to visit The Heritage Society in Houston to study about 19 h century houses.

ASSISTANT: That's great.

USER: Can you please book a flight ticket from DEN to IAH?

ASSISTANT: Sure, I will help you. Please provide your itinerary dates.

USER: Sure, I need to depart on 12/14 and return on 12/16.

ASSISTANT: Robert, give me a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, I have found a flight on your requested dates with Delta airline with flight number 1012.

USER: That's great.

ASSISTANT: Shall I book?

USER: Please confirm it.

ASSISTANT: Robert, your ticket has booked.

USER: Thank you for your help.

ASSISTANT: You are welcome. Thank you for choosing us, have a safe journey.