You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how do I help you?

USER: I am planning to attend my sister marriage at  Phoenix PHX, can you help me with booking?

ASSISTANT: Sure, can I know your name?

USER: I am Jeffrey Davis.

ASSISTANT: Where do you want to board?

USER: I will start from Charlotte CLt.

ASSISTANT: On which dates are you going to travel?

USER: I will start on 06/16 and return on 06/18.

ASSISTANT: How much you can afford?

USER: I can up to 200.

ASSISTANT: We found a flight of  southwest airline, flight number as 1021 with the fare of 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.