You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to visit Dallas zoo with my friends. Can you help me in booking a ticket?

ASSISTANT: May I know your origin and destination airport codes?

USER: I am planning my journey from MSP to DFW.

ASSISTANT: May I know your trip dates please?

USER: I am planning my journey on 05/04 and return by 05/06.

ASSISTANT: May I know your name please?

USER: My name is Jonathan Anderson.

ASSISTANT: Jonathan, no flights has been found on your journey dates.

USER: That's fine, I go with other agency. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.