You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: I want to travel from DFW to PHX. Can you help me to book a flight ticket?

ASSISTANT: Sure, please let me know how many connection do you need.

USER: I am looking for a direct flight.

ASSISTANT: When are you planning to make your trip?

USER: I want to fly in the flight on Jan 24 and Jan 26.

ASSISTANT: Is there any other requirements?

USER: I want to return in afternoon time.

ASSISTANT: May I know your name?

USER: I am Nicholas Martin.

ASSISTANT: Ok Nicholas Martin, I have tried to find a flight for you but could not find any flights that would return in the timings you required.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for opting us.