You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Brian Parker here. I would like to book a flight ticket from MCO to IAD, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, may I your travelling dates?

USER: Sure, I am willing to travel on 10/10 and please book my return ticket on 10/12.

ASSISTANT: Give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Oh! So sad to hear. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.