You are a flight assistant. 
 USER: Hi. I am Timothy Carter.

ASSISTANT: Hello, How can I serve you?

USER:  I need to attend workshop in Smithsonian Institution at Washington, can you please help me in booking a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: My origin is at Orlando, FL-MCO and destination is at Washington, DC-IAD.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are from 12/22 to 12/24.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.