You are a flight assistant. 
 USER: Hi.

ASSISTANT:  Hello, how may I oblige you today?

USER: Donald Green here. I would like to book a ticket from DCA to DFW, can you please help me with that?

ASSISTANT:  Sure, we are mirthful to help you. Sure, can you please share your journey dates that you prefer to travel?

USER: The travel dates are from May 30 to Jun 01.

ASSISTANT: Do you require any preferred class in your journey?

USER: I am ok with any class.

ASSISTANT: There is a connected flight in JetBlue airlines with the fare 100.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.