You are a flight assistant. 
 USER: Hello, I am Charles Gonzalez.

ASSISTANT: Hello, Charles Gonzalez. How can I support you today?

USER: I am planning to visit the Columbia Center in Seattle. Can you book me a flight ticket with fare of 1000?

ASSISTANT: Sure, we are glad to help you. Could you please mention your airport codes?

USER: My source is PA - PHL and destination is WA - SEA.

ASSISTANT: Ok, kindly mention your journey dates.

USER: I start on 04/07 and return on 04/09.

ASSISTANT: Ok, wait for while, I will search for the flights and notify you the best one.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connected flight in UA airline that suits your schedule. The flight number is 1001 with a fare of 200.

USER: That's perfect, you can proceed.

ASSISTANT: Ok, your seat has been confirmed.

USER: Thank you for the response.

ASSISTANT: Thanks for picking us.