You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I want to book a flight ticket from Houston to attend a business meeting in Phoenix, can you help me to book a flight ticket with single connection?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: 04/17 and 04/19 are my planned travelling dates.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

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

USER: My source and destination airport codes are HOU and PHX. I am Anthony Harris.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Anthony Harris, we regret to inform you that there are no flight services are available on this route on your provided dates.

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

ASSISTANT: Thank you for contacting us.