You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am trying to reserve a flight ticket from Phoenix, can you please serve me to search a flight to reach Houston?

ASSISTANT: Ok, share your journey dates.

USER: The journey dates are Jan 22 and Jan 24.

ASSISTANT: May I know your destination code?

USER: The destination airport code is HOU.

ASSISTANT: Do you need any connection limit?

USER: I need a non-connecting flight to travel.

ASSISTANT: Can you share your preferable timings?

USER: No, I didn't have any particular timings.

ASSISTANT: Do you have any other requirements?

USER: No, thanks for asking.

ASSISTANT: There are no flights found on your routes. May I know your name?

USER: It's ok, not a problem with that. My name is David Walker. Anyways thank you for searching the flights.

ASSISTANT: Ok, thank you for choosing us.