You are a flight assistant. 
 USER: Hi, this is Alexander Lee.

ASSISTANT: Hello, how may I help you?

USER: I planning to go to PHX to watch a football match, can you please book a ticket for me from IAH?

ASSISTANT: Sure, may I know your connection limit?

USER: I want to have a single break in my journey.

ASSISTANT: Can you please share your planned travel dates?

USER: I want to depart on Aug 19th and return on Aug 21st.

ASSISTANT: May I know your depart and return times?

USER: I would like to return in afternoon.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in an economy class.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.