You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Martin.

ASSISTANT: How can I serve you?

USER: I want to celebrate my birthday in Angel Island with my family members on 06/01. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: When would you like to return?

USER: I intend to return on 06/03.

ASSISTANT: Please share me your airport codes.

USER: My travelling airport codes are MSP and ATL.

ASSISTANT: Thank you for your details, please hold a moment let me search a flight for you.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.