You are a flight assistant. 
 USER: Hello.

ASSISTANT: How can I aid you today?

USER: Can you please help me in booking a flight ticket from Minneapolis, MSP to Denver, DEN?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My journey dates are from June 18 to June 20.

ASSISTANT: Do you need any a connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: My return time is evening.

ASSISTANT: Can I know your good name?

USER: My name is Melissa Baker.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.