You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Margaret Edwards. I want to travel from IAD to DTW for attending a seminar.Could you please help me for booking a ticket?

ASSISTANT: Can I know your travel details?

USER: My travelling details are 01/02 to 01/04.

ASSISTANT: Sorry to inform you, no flights are available for you.

USER: Thank you. No issue.

ASSISTANT: Thanks for choosing us.