You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Will you help me in booking the flight ticket from DFW to ORD?

ASSISTANT: May I know your trip dates?

USER: My preferable journey dates are June 21 and June 23.

ASSISTANT: Do you prefer connecting flight or direct flight?

USER: I am comfortable in any connection.

ASSISTANT: Do you have any other requirements?

USER: I prefer to travel in major airlines which returns is morning time.

ASSISTANT: May I know your name?

USER: Myself Jacob Baker.

ASSISTANT: There were no flights found with your required deails.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.