You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Wright here.

ASSISTANT: How can I assist you today?

USER: I would like to visit Houston for a business meeting, can you please help me out with booking of a flight ticket from LAS to HOU?

ASSISTANT: Sure, I will here to help you with that booking, may I know your travelling dates?

USER: Thank you, I am planning to leave my location on 11/06 and please book my return ticket also on 11/08.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight available on your route. Thank you for opting us.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there. Thank you for the information.