You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Patrick Lewis here.

ASSISTANT: How may I help you?

USER: I want to attend a seminar on spirituality, so please book my ticket from DTW to DFW.

ASSISTANT: Sure, I am here to assist you. Can you please let me know your travel dates?

USER: My itinerary dates are Feb 16 and Feb 18.

ASSISTANT: Ok, do you have any class preference?

USER: No, I need a connecting flight.

ASSISTANT: Ok, may I know your other requirements?

USER: I want to depart in the morning.

ASSISTANT: I am sorry to tell you that there is no flight available on your given travel dates.

USER: No problem, thank you.

ASSISTANT: You are welcome and have a nice day.