You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to travel from MSP to EWR for attending a seminar, can you please help me out with that?

ASSISTANT: When you are willing to travel?

USER: Thank you for accepting my request, my departure is on Apr 19 and please book my return ticket on Apr 21.

ASSISTANT: Do you have any connection limit?

USER: Yes, I will prefer single connection.

ASSISTANT: May, I know your good name?

USER: Sure, my name is Lisa Nelson.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Oh! Sad to hear that. Anyway, I will reach to another booking agency. Thank you for the information.

ASSISTANT: Thank you for reaching us.