You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Katherine Edwards here.

ASSISTANT: How may I help you today?

USER: I would like to book a ticket to Phoenix to attend to my brothers wedding, please help me in booking a ticket from IAH to PHX?

ASSISTANT: Can you share your travelling dates of your following trip please?

USER: The travelling dates are from 08/19 to 08/21.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights were found on your requested dates.

USER: That's ok, no issues.

ASSISTANT: Thank you for approaching our agency. Have a great day.

USER: Most welcome.