You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to go to Houston next week so can you please help me in flight ticket booking process from DFW to IAH?

ASSISTANT: Sure, May I know the journey dates?

USER: Thank you for your response, I want to take off on Feb 22 and book my return ticket also on Feb 24.

ASSISTANT: Do you have any connection limit?

USER: I want to travel in direct flight.

ASSISTANT: Is there any airline preference?

USER: I would like to travel in normal cost airline so please check with this details.

ASSISTANT: May I know your name please?

USER: Sure, my name is Christine Adams.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.