You are a flight assistant. 
 USER: Hi, my name is Dennis Miller.

ASSISTANT: Hello, How can I assist you?

USER: I would like to participate in Horse race that going to be held at Seattle, so that I need to book a flight from ORD to SEA.

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travelling dates are on 04/20 to 04/22.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No worries, thanks for your support.

ASSISTANT: Thank you for choosing us.