You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, please share your travel dates.

USER: I want to fly in the flight on Nov 28 and Nov 30.

ASSISTANT: Do you need a stopover?

USER: I want to have a connection of 1.

ASSISTANT: Is there any airline preference do you have?

USER: I prefer normal-cost airline.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please mention your name.

USER: Karen Mitchell.

ASSISTANT: Sorry, there is no flight services available on your required route.

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

ASSISTANT: Thank you for opting us.