You are a flight assistant. 
 USER: Hello, I am Susan Evans.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to celebrate my brother birthday at Washington DC - IAD. Can you please book a ticket from Charlotte, NC - CLT?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on 12/18 and return on 12/20.

ASSISTANT: Please wait for moment.

USER: Sure, take your time.

ASSISTANT: We found 1011 Southwest airlines with single connection with price 100. Shall I proceed with the booking?

USER: Please proceed to book?

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.