You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to travel from PHX to HOU, help me in booking a flight?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I like to travel on May 19 to 21.

ASSISTANT: Do you have any specifications about flight connections?

USER: I prefer single connection flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: I am Benjamin Thompson. I want to departure in afternoon flight.

ASSISTANT: There are no flights found under your preferable details.

USER: That's ok, thank you.

ASSISTANT: Welcome, have a great day.