You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am George Collins need to book a ticket to MSP from DFW, can you please help me in reservation?

ASSISTANT: When are you planning to make your journey?

USER: My planned dates are from Jun 14 to Jun 16.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the evening.

ASSISTANT: May I know your departure time and arrival time?

USER: Already mentioned.

ASSISTANT: Ok, any connection limit  do you prefer?

USER: I need a connecting flight.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.