You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Laura Williams here. I want to book a connecting flight from SEA to LAS. Can you help me in that?

ASSISTANT: Sure, I will help you with that. Could you send me your travelling dates?

USER: My trip dates are Apr 23 to Apr 25.

ASSISTANT: Ok, may I know your class specifications?

USER: I don't have any class preference.

ASSISTANT: Do you have any other requirements?

USER: My depart time should be in the evening.

ASSISTANT: Do you any connection limits?

USER: I have already mentioned above.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your journey details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for consulting us.