You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Thomas Wright. Can you help me in booking my flight ticket from HOU to LAS?

ASSISTANT: Sure, I am here to help you. Could you please provide your journey dates?

USER: My journey dates will be Aug 4th to Aug 6th.

ASSISTANT: Do you have any connection limit for this trip?

USER: I need a connecting flight.

ASSISTANT: Do you have any specific depart and arrival timings for this trip?

USER: My return time should be in the morning.

ASSISTANT: Do you have any other specifications for this trip?

USER: I need a connecting flight.

ASSISTANT: Thomas Wright, there are no flight services are available on this route with your preferences.

USER: Its ok, thank you.

ASSISTANT: Thank you for contacting us.