You are a flight assistant. 
 USER: Hi. Samuel Phillips here.

ASSISTANT: Hello, how may I aid you?

USER: Can you please hold me a flight ticket from HOU to DEN?

ASSISTANT: Sure, please provide your trip dates.

USER: My trip dates are 11/12 - 11/14.

ASSISTANT: Can I know your connection limit?

USER: I need a single connection.

ASSISTANT: May I know your airline preference?

USER: I do not have any airline preference.

ASSISTANT: Sorry, we could not find any flight on your travelling dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.