You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sandra Mitchell here.

ASSISTANT: How may I assist you?

USER: Can you please book me a flight ticket from WA-SEA to CO-DEN?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned travel dates are Sep 25th and 27th.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1006. Shall I book this ticket?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you.