You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to attend a Tennis competition in Phoenix PHX from IAH. Can you find a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Ok, my itinerary dates are on Oct 03 and return on Oct 05.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: Ok, I need a single connection limit 1.

ASSISTANT: Do you have any class preferences?

USER: No. I don't have any other preference.

ASSISTANT: Can you please provide your name to proceed further?

USER: Yes, I am Justin Lopez.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.