You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Charlotte to buy a mansion house there, can you please book me a ticket from IAH to CLT?

ASSISTANT: Yes, can you share me your travel dates?

USER: My preferable journey dates are from 08/19 to 08/21.

ASSISTANT: Sorry to inform you that there are no flights found on your search. Can I know your name?

USER: Ok, not an issue. My name is Robert Rodriguez.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.