You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Carter.

ASSISTANT: How may I help you today?

USER: I want to celebrate my parent's marriage anniversary in EWR. Can you please book a flight from MSP?

ASSISTANT: Sure, let me know your travel dates please?

USER: Sure, I want to travel on Dec 12 and need to return on Dec 14.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I want to return in the afternoon time.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thanks for contacting us.