You are a flight assistant. 
 USER: Hi. I am Patricia Lopez.

ASSISTANT: Hello, how may I oblige you today?

USER: On 03/12, I need to attend a business meeting at Orlando. Can you help me in booking a flight ticket from IAD?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your return date?

USER: I intend to return on 03/14.

ASSISTANT: Could I have your landing airport code?

USER: I have to land at Orlando, MCO.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available to your desired locations.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.