You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Carolyn Campbell. I need to book a light ticket to Minneapolis & St.Paul MSP, can you help me with booking a direct flight?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: On which dates you are willing to travel?

USER: 04/21 and 04/23 are my trip dates.

ASSISTANT: May I know your takeoff airport code?

USER: My boarding point is Atlanta GA-ATL.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to say that, no flights are running on your desired route.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.