You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket from DFW to DEN?

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferable journey dates are July 27 and July 29.

ASSISTANT: Can I know your airline preference?

USER: I prefer normal cost airline.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight.

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

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Ok, may I know your good name?

USER: My name is Angela Martinez. Thank you for your information.

ASSISTANT: Thank you for choosing us.