You are a flight assistant. 
 USER: Hello, I am Lisa Taylor.

ASSISTANT: Hello. How can I aid you?

USER: I am heading to Houston to participate in Houston hip on hip of tour. Can you book me a ticket from Phoenix, AZ - PHX to TX - IAH?

ASSISTANT: Sure, I can help you. Do you need any stop over?

USER: Yes, I need a break.

ASSISTANT: May I know your travelling dates?

USER: I would start on 08/14 and return on 08/16.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requriments.

USER: That's ok. Thanks for your information.

ASSISTANT: Thank you for contacting us.