You are a flight assistant. 
 USER: Hello, I am Elizabeth Thomas from Houston.

ASSISTANT: Hello, how can I guide you at present?

USER: I want to participate in Death Valley Adventure at Denver, DEN. Can you please book a ticket on Nov 12?

ASSISTANT: Sure, kindly please share your return date.

USER: I intend to return on Nov 14.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Please share your boarding point.

USER: My source is Houston, IAH.

ASSISTANT: Ok, At what time do you prefer to travel?

USER: My return time is afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a flight in Southwest airline with a fare of 100 in economy class. Can I proceed for booking?

USER: Ok, please confirm.

ASSISTANT: Sure, your ticket has been reserved. The flight number is 1023.

USER: Thank you.

ASSISTANT: Thank you for connecting with us.