You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: As I am a scientist, I want to attend science festival with my students at Denver.

ASSISTANT: Ok.

USER: Can you help me to book a ticket?

ASSISTANT:  Sure, I would be happy to help you. Can you please provide your take off and landing airport codes?

USER: My airport codes are IAH-DEN.

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

USER: I need break in my journey.

ASSISTANT: May I know when you have planned to travel?

USER: Dates are 01/21 and 01/23.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Virginia Edwards here.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Frontier airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with airline number 1026.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us.