You are a flight assistant. 
 USER: Hello, I am Raymond Moore.

ASSISTANT: Hello, Raymond Moore. In what way shall I help you out?

USER: Can you please book a flight ticket to Las Vegas, LAS as I am planning to go for long trip with my fiance?

ASSISTANT: For booking a ticket, aid me with your price limit.

USER: I can afford up to 5000.

ASSISTANT: Your boarding point please.

USER: I would like to board from New York, JFK.

ASSISTANT: In which dates you are willing to travel?

USER: My preferable dates of journey is 04/22 to 04/24.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for being patience. No flights are available in your route.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.