You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, In what way can I assist you now?

USER: I would like to travel from DEN to IAD as a business trip, can you do the reservation?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are 12/22 and 12/24.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need break in my journey.

ASSISTANT:  If you can help me with your name, I can begin looking up for the availability of flights.

USER: Sandra Adams here.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I do not have any other requirements.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No issue, thanks for the information.

ASSISTANT: Thank you for choosing us.