You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Edwards here.

ASSISTANT: How can I assist you?

USER: I want to buy a new house in Seattle, can you please help me in booking a  flight ticket?

ASSISTANT: Sure, I will help you for booking. Can you please provide me your travelling dates?

USER: My travelling dates are from 11/20 till 11/22.

ASSISTANT: Ok, may I know your airport codes?

USER: My source code is PHL and my destination codes is SEA.

ASSISTANT: Yes, I found a flight fore you with single connection. Shall I proceed for booking?

USER: Yes, you can proceed.

ASSISTANT: Your ticket is booked with flight number 1004 and airline is Southwest.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for booking.