You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book flight ticket from SFO to CLT?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are Sept 12 and Sept 14.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I prefer normal cost airline for this trip.

ASSISTANT: May I know your name?

USER: I am Thomas Miller.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.