You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Nicole Garcia from Houston. Can you please book a flight ticket from IAH to PHX?

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you for your positive response, I want to take off on 03/24 and please confirm my return ticket also on 03/26.

ASSISTANT: Sorry for our inconvenience, there is no flight available as per your request.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome.