You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How can I aid you today?

USER: Please book a flight ticket to Denver, CO - DEN from Detroit, MI - DTW.

ASSISTANT: Ok, I will help you in booking your ticket.

USER: As I want to attend a Sport's Festival. Can you help me?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Let me know your willing dates of journey.

USER: My starting date is on 02/03 and return date is on 02/05.

ASSISTANT: Do you want any halt in between your journey?

USER: Yes, I need a flag stop.

ASSISTANT: Thanks for sharing your details.

USER: Ok.

ASSISTANT: There is a flight found with the fare of 700 with a flag stop.

USER: Please do not proceed, my fare is 500 only.

ASSISTANT: May I know your name?

USER: I am Frank Johnson.

ASSISTANT: Thank you for availing us.

USER: Thank you.