You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Angela Allen here.

ASSISTANT: Allen, how can I assist you?

USER: My planning is from DC-IAD to CO-DEN, can you please help me to book a ticket?

ASSISTANT: Sure, please share your trip dates.

USER: Ok, my dates of travel is from 04/02 to 04/04.

ASSISTANT: Please hold on for a while.

USER: Sure, take your time. Please make sure that the price is 200.

ASSISTANT: Southwest airlines with flight 1015 is available for you based on your requirements.

USER: Ok, please proceed to book.

ASSISTANT: Your ticked is confirmed.

USER: Thank you for your help in booking a ticket.

ASSISTANT: Thank you for reaching us.