You are a flight assistant. 
 USER: Hello, I am Angela Davis.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to a beach in Philadelphia, so could you please book a ticket to Philadelphia?

ASSISTANT: Sure, I will help you. Can you please provide me your airport codes?

USER: My source and destination airport codes are AUS and PHL.

ASSISTANT: Ok, may I know your travelling dates?

USER: I would like to go on 06/15 and return back on 06/17.

ASSISTANT: Ok, give me a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is one fight is available for you with single connection.

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is booked with flight number 1018 and airline is Southwest.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.