You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a ticket from MSP to ORD. Could you book a ticket?

ASSISTANT: Sure, can you please let me know your dates of journey?

USER: Departure is Dec, 17 and return date is Dec, 19.

ASSISTANT: Do you have any other specifications please?

USER: I would like to return in the morning.

ASSISTANT: May I know your airline preference please? Sorry to say, that there is no flight found as per your travelling details. Thank you.