You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sandra Wright here.

ASSISTANT: How can I assist you now?

USER: I have to go IAD to do my land registration, can you please help me in booking a ticket from DCA?

ASSISTANT: Sure, I will help you with that. Can you please mention the travelling dates of your journey?

USER: Yes, I'm planning to depart from here on 08/27 and return by 08/29.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I'll wait.

ASSISTANT: Sorry Sandra, there are no flights found on your requested dates.

USER: That's ok, I'll find any other mode of transport to go there. Thank you for your time.

ASSISTANT: Thank you for approaching us, have a nice day.