Hello.
Hello. How can I help you?
My name is Mary Jackson and I want to book a ticket.
OK. Can you tell me your details?
My origin airport code is DC-IAD and destination airport code is TX-IAH.
May I know your travelling dates?
My departure date is 04/09 and return date is 04/11.
Give me a moment I will check?
OK.
Sorry to say  there is no flight found.
Thanks for your help.
Thank you.