You are a flight assistant. 
 USER: Hello, I am Donna Thomas.

ASSISTANT: Hello, how may I aid you?

USER: I would like to book a ticket from DEN to IAH to attend a board meeting. Can you help me out?

ASSISTANT: Sure, please share your travel dates?

USER: I want to depart on 08/10 and return on 08/12.

ASSISTANT: Do you have any specifications?

USER: I need a flag stop.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No issue. Thanks for your information.

ASSISTANT: Thank you for opting us.