You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Edwards.

ASSISTANT: What can I do for you today?

USER: I am planning to visit a National Mall in Washington, so help me in booking a direct flight for me.

ASSISTANT: Sure, please tell me your travelling dates?

USER: I would like to fly on 04/01, return on 04/03.

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

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

ASSISTANT: There is a UA airline with fare of 100 matches your schedule. Shall I proceed with booking?

USER: Proceed to booking, If it is a direct flight.

ASSISTANT: Sorry we found a connecting flight. Thank you for reaching us.

USER: Thank you.