You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Robinson.

ASSISTANT: How can I provide assistance to you at this moment?

USER: I want to book a flight ticket to Detroit from Washington, so can you help me in booking a direct flight for me?

ASSISTANT: Sure, please put forward your travelling dates?

USER: Yes, my travelling dates are 06/13 and 06/15.

ASSISTANT: Ok, help me with your near by airport codes?

USER: My airport codes are DC-IAD and MI-DTW.

ASSISTANT: There is a 1023 Hawaiian airline with fare of 200 matches your schedule.

USER: That's perfect, please go with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.