You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from DCA to DEN as a business trip. Can you do the reservation?

ASSISTANT: Sure, please provide your travel dates.

USER: My journey dates are 02/21 and 01/23.

ASSISTANT: Do you have any preferences?

USER: Sorry, My trip dates are 02/21 and 02/23. I do not have any preference.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Flight-1020 is available in Frontier airlines with double connection and the flight fare 100. Can I proceed?

USER: Go ahead.

ASSISTANT: To proceed, please mention your name.

USER: Frank Allen here.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.