You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are looking from our travel agency?

USER: Pamela Mitchell here. I would like to meet my partner at Chicago, please help me in booking a ticket from IAD to ORD.

ASSISTANT: Sure, please provide me the travel dates of your journey.

USER: My travel dates are 02/21 and 02/23.

ASSISTANT: Ok, please hold on for a minute. So that, I will find flight for you.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, I have checked the flight availability in this route but I have not found a flight.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching us.