You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please book a flight ticket from IAH to DCA.

ASSISTANT: Sure, can you please share your travelling dates?

USER: I want to travel from Aug 31st to Sept 2nd.

ASSISTANT: Do you need any break in between the journey?

USER: I need a connecting flight.

ASSISTANT: Ok, please share your specifications.

USER: I prefer to travel in well known airlines for their safety.

ASSISTANT: Ok, may I know your name please?

USER: I am Anthony Allen.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no flights found with your details.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.