You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket from DEN to IAD?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travel dates are from Jan 20 to Jan 22.

ASSISTANT: Please share me your name.

USER: Anna Thompson here.

ASSISTANT: Do you have any specifications?

USER: I would prefer normal-cost airlines for my journey.

ASSISTANT: Flight-1026 is available with American airlines having single connection and the ticket costs you 100 only in economy class. Are you comfortable with this flight?

USER: Yes, I am ok with this flight. Please book it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for booking.

ASSISTANT: Thank you.