You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to travel from DCA to IAH for attending a meeting with my boss, can you help in booking my reservation?

ASSISTANT: Sure, please provide me your travel dates.

USER: My dates of journey will be from 01/31 to 02/02.

ASSISTANT: Please wait, let me check for the available flights on 01/31 to IAH.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights available to IAH on 01/31.

USER: That's sad news, anyways thanks for checking.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, myself Kathleen Brown.

ASSISTANT: Thank you Brown, have a nice day.

USER: You are welcome.