You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to attend music concert at IAH, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Sure, on which dates would you like to travel?

USER: I would like to take off on Dec 13 and return on Dec 15.

ASSISTANT: Do you have any specifications?

USER: Yes, I prefer business class.

ASSISTANT: May I know your name?

USER: My name is Brandon Edwards.

ASSISTANT: Please wait for a minute.

USER: Ok, but I am looking for a connecting flight.

ASSISTANT: Ok. Sorry, there were no flights found on your route.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.