You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Ryan Harris here, I want to visit Houston Zoo. So, please can you book my ticket from DEN to HOU?

ASSISTANT: Sure, can I know your travel dates?

USER: My travel dates are from 02/02 to 02/04.

ASSISTANT: Please give me a minute, I will check the details.

USER: Sure, take your time.

ASSISTANT: The flight 1012 of Frontier airlines is available on your request. Shall I proceed?

USER: Yes, please go ahead.

ASSISTANT: Ryan, your ticket is booked successfully.

USER: Thank you.

ASSISTANT: You are welcome.