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

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in booking a flight ticket to Washington, DC - IAD?

ASSISTANT: Sure, when are you planning to travel?

USER: My planned trip dates are from 05/09 to 05/11.

ASSISTANT: Please provide your origin airport code.

USER: I want to fly from Philadelphia, PA - PHL.

ASSISTANT: UA airlines with single connection and price is 100 of 1000 flight. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.