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 HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you for your response, I want to take off on Feb 05 and book my return ticket also on Feb 07.

ASSISTANT: Do you have any connection limit?

USER: I will prefer 1 break in between my journey.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Sorry, there are no flights found with your details.

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

ASSISTANT: Thank you.