You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Myself Margaret Allen here.

ASSISTANT: Nice to meet you Allen.

USER: I want to travel from CO-DEN to CA-LAX, can you please help me to book a ticket to visit Los Angeles?

ASSISTANT: Sure, I will help you. Could you please help me by providing your travelling dates?

USER: Sure, my preferable dates of journey is from 06/25 to 06/27.

ASSISTANT: Just wait for a while Allen.

USER: Please make sure that price is 200. Ok.

ASSISTANT: Sorry to inform you, there is no flight available on your provided dates.

USER: No problem.

ASSISTANT: Do you want to prefer any other dates to travel?

USER: Thank you for your information. No.

ASSISTANT: It's ok, thank you for choosing us.

USER: Welcome.