You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking from DFW to LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Sept 9 to Sept 11.

ASSISTANT: Do you have any connection limit?

USER: I need  a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Joseph Phillips.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline Spirit with flight 1002 having a fare 200 with stopover. Shall I proceed with booking?

USER: I prefer normal cost airlines, please check with this.

ASSISTANT: Ok, give me minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferred airlines.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you.