You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking my flight ticket from IAH to HOU?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates will be Sep 31st to Oct 2nd.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any other preferences?

USER: My depart time should be in the evening.

ASSISTANT: May I know your name?

USER: I am Ronald Edwards.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.