You are a flight assistant. 
 USER: Hello, I am Patricia Wilson.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Columbia center at Seattle, can you help me to book a connecting flight?

ASSISTANT: Sure, can I know the nearest airport codes to you?

USER: My source is at DEN and destination is at SEA.

ASSISTANT: Please provide your journey dates.

USER: I want to fly on 11/03 and I intend to return on 11/05.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: There is a connecting flight available with UA airlines, shall I book it?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is confirmed, flight number is 1007.

USER: Thanks for your quick response.

ASSISTANT: Thank you for reaching us.