You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Michelle Baker.

ASSISTANT: How can I help you?

USER: I am planning to travel from DCA to IAD to attend live concert at Washington, can you please help me with booking a flight ticket?

ASSISTANT: Sure, could you provide me your departure and arrival dates?

USER: Sure, I would like to take off on 12/22 and return back on 12/24.

ASSISTANT: Yes Baker, I found a flight-1004 with Hawaiian airlines.

USER: Make sure that the price limit should not exceed 200.

ASSISTANT: Shall I proceed with the booking?

USER: Ok, please proceed with booking.

ASSISTANT: Yes Baker, your ticket is confirmed.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for contacting us, have  a safe journey.

USER: You are welcome.