You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I am Ruth Clark. I would like to book a ticket from ORD to IAD, can you help me?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travel dates are 07/28 and 07/30.

ASSISTANT: Ruth Clark, Sorry for inconvenience caused. I didn't find any flight with your travel dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.