You are a flight assistant. 
 USER: Hello, I am Elizabeth Walker.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to meet my friend's in Dallas, can you please help me to book a flight ticket with the price of 200?

ASSISTANT: Sure, can you help me with your journey dates please?

USER: My journey dates are from 08/09 to 08/11.

ASSISTANT: Ok, please help me with your airport codes please?

USER: I am travelling from IAD to DFW. Make sure that I need a flight with single connection.

ASSISTANT: Ok, flight 1002 with Delta airlines matches with your requested details. The price is 100 with single connection.

USER: Ok, you can proceed with my booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.

USER: Thank you.