You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Alexander Nelson. I am planning to visit Phoenix PHX from Houston HOU. Can you find a flight ticket for me?

ASSISTANT: Sure, I can help you with that. Could you please tell me your preferred trip dates?

USER: Sure, my journey dates are on Aug 19 and return on Aug 21.

ASSISTANT: Ok, please tell me your preference related to connection limit.

USER: Ok, I need a single connecting flight to travel.

ASSISTANT: Ok, do you have any particular timings to depart and return?

USER: Yes, I want to return in the afternoon time.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to intimate you that, there is no flight which is returning in the afternoon time on the dates you have given.

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

ASSISTANT: You are welcome. Thank you for reaching us.