You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please book a flight ticket from IAD to IAH?

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

USER: My journey dates are Nov 04 and Nov 06.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please let me know your name.

USER: I am Melissa Gonzalez.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.