You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Can you please book me a ticket from SFO to DFW?

ASSISTANT: Sure, when are you planning to depart and return on?

USER: My preferable journey dates are June 09 and June 11.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need connecting flight.

ASSISTANT: In which airline do you want to fly?

USER: I prefer normal cost airlines.

ASSISTANT: Can I know your good name?

USER: My name is Anthony Edwards.

ASSISTANT: Thank you for your details, but currently there are no flights found with the given details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you.