You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you today?

USER: Can you please help me in booking flight ticket on dates 26 and 28 of July?

ASSISTANT: Sure, can you please let me know your travelling airport codes?

USER: My airport codes are DFW and HOU.

ASSISTANT: For further proceeding, may I know your good name please?

USER: My name is Scott Wright.

ASSISTANT: Would you like to fly in business class flight or economy class flight?

USER: I need a ticket in economy class.

ASSISTANT: Are you comfortable with direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any specific time preference for you in depart and return?

USER: I am comfortable to travel at any time.

ASSISTANT: May I know your airline preference please?

USER: I don't have airline preference.

ASSISTANT: Sorry Wright, there is no flight found as per your travelling details.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.