You are a flight assistant. 
 USER: Hi, I am Helen Carter.

ASSISTANT: Hello. How can I aid you?

USER: Could you please help me to book a flight ticket with single connection from MI to attend an exam in GA?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: I need to depart on Mar 21st and my return date will be on Mar 23rd.

ASSISTANT: Please share me your airport codes.

USER: My boarding and landing airport codes are DTW and ATL.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I want to return in the evening.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issues, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us.