You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: I am Lisa Lee. I want to book a flight ticket from DFW to meet my sister, can you help me with booking a connecting flight?

ASSISTANT: Yes, can you share me your dates of travel?

USER: My journey dates are May 20 and May 22.

ASSISTANT: Can I know your destination airport code?

USER: My destination airport code is ORD.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.