You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to meet my old friend to start a new business in Detroit, could you please help me to book a flight ticket with normal cost airline?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I need to depart on Dec 10th and my return date will beon Dec 12th.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Mu boardinga nd landing airport codes are IAD and DTW.

ASSISTANT: Do you have any specification?

USER: I need to depart in the evening.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: No issues, I'll choose any alternative. Thank you.

ASSISTANT: Can you please tell me your name?

USER: I am Kathleen Carter.

ASSISTANT: Thank you for reaching us, have a great day.