You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Larry White. Due to having an important work at LGA, I want  to book a ticket from DFW.

ASSISTANT: Ok. I can only search flights, if you provide all your travelling dates.

USER: Ok. My travelling dates are from 09/18 to 09/20.

ASSISTANT: Ok.

USER: With 1 connection.

ASSISTANT: Thanks for sharing your journey details. We hardly tried to avail you, but no flights are in progress on respective dates of your journey.

USER: Ok. Thank you for your information.

ASSISTANT: Thanks for approaching us, Have a nice day.