You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Kevin Mitchell. I want to book a ticket from CLT to IAD to meet my father, can you help me in booking?

ASSISTANT: Sure, help me with your trip dates.

USER: I am departing on 11/22 and return on 11/24.

ASSISTANT: Please give me a minute.

USER: Sure.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.