You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dorothy Hall here.

ASSISTANT: What can I do for you Dorothy?

USER: I want to book a ticket from DFW to ORD for a marriage function.

ASSISTANT: What dates would you like to book a ticket?

USER: I would like to travel from 04/27 to 04/29.

ASSISTANT: Flight 1013 is available for you, shall I book it for you?

USER:  Please book it.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thanks for resching us.