You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Jacob Baker here. As I am a doctor, there is a patient in IAD, so can you please book a ticket from DFW?

ASSISTANT: Sure. Your preferable dates please?

USER: My travelling dates are from 08/19 to 08/21. Make sure that there is 1 connection limit.

ASSISTANT: I have found a flight which satisfies all your requests.

USER: Please proceed.

ASSISTANT: Your ticket has been booked, flight-1023 of Southwest airlines.

USER: Thank you for your help.

ASSISTANT: Welcome.