You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Rachel Wright here. I want to book a flight ticket from DFW to HOU for a vacation.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 08/28 to 08/30. Make sure that there is 1 connection limit.

ASSISTANT: Sorry Rachel, no flight's found on your details.

USER: That's not a big deal. Thank you for your help.

ASSISTANT: Thank you for contacting us.