You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jacob Wright here.

ASSISTANT: How may I assist you now?

USER: I want to travel from LAS to IAD for my business trip, can you please check is there any flight available between those locations?

ASSISTANT: Ok, please mention your desired dates for this journey.

USER: Thank you, my departure is on Dec 03 and please book my return ticket also on Dec 05.

ASSISTANT: May I know your depart and return time?

USER: I would like to return at evening time.

ASSISTANT: Do you need a connection flight?

USER: I will prefer single connection for my journey.

ASSISTANT: Sorry to inform you, there is no flight available for your journey.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: THank you for choosing us.

USER: Welcome.