You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amanda Jackson.

ASSISTANT: How can I assist you today?

USER: I want to book a ticket from IAH to IAD to attend seminar, can you help me in booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am departing on 10/28 and return on 10/30.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time.

ASSISTANT: Amanda, I am sorry to inform you that there is no flight available at your requested dates.

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

ASSISTANT: Thank you for reaching us, have a great day.