You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Andrew Johnson is my name. I am planning to participate Sports Festival at Washington, can you please help me to book a flight ticket under the fare of 200?

ASSISTANT: Please specify your travelling dates?

USER: Sure, I would like to travel on 04/03 to 04/05.

ASSISTANT: Can you please share your airport codes?

USER: Sure, my airport codes are IAH to IAD.

ASSISTANT: There is a Hawaiian airline with flight number 1009 and fare 100. Shall I proceed?

USER: Sure, you can proceed for booking.

ASSISTANT: Thank you for your assistance.

USER: Thank you.