You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Gregory Brown. I want to book a ticket from HOU to LAS to attend workshop, can you help me in booking?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am departing on 22 Aug and return on 24 Aug.

ASSISTANT: Do you have any connection limit?

USER: I want a flight with connection limit 1.

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

USER: I want to depart in afternoon.

ASSISTANT: Is there any other preferences?

USER: I do not have any other specifications.

ASSISTANT: Thanks for your details, there are no flights found on your data.

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

ASSISTANT: Thank you.