You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Rachel Lewis. I am planning to visit Washington to meet my grand father, can you please book a ticket for me?

ASSISTANT: Sure, on which dates you are planning to fly?

USER: My planning dates are from 12/11 till 12/13.

ASSISTANT: Can you help me with your airport codes?

USER: My airport codes are from PHL to IAD.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: I have found a flight-1024 of Southwest airlines, shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been booked, have a happy journey. Thank you for choosing us, have a safe journey.

USER: Thank you for booking.