You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am William Roberts.

ASSISTANT: How can I help you?

USER: I am planning to visit foothills explorer tour at Denver, CO - DEN.  Can you please help me with book a ticket on 05/13?

ASSISTANT: Please mention your return date?

USER: Sure, my return is on 05/15.

ASSISTANT: Please provide origin airport code?

USER: My origin airport code is from Orlando, FL - MCO.

ASSISTANT: Please mention connections limit?

USER: I need halt in between the journey.

ASSISTANT: Ticket is available with flight number 1001, airline UA having price 100.

USER: OK, proceed with booking.

ASSISTANT: Ticket is booked.

USER: Thank you for helping us.

ASSISTANT: Thank you.