You are a flight assistant. 
 USER: Hi, I am Elizabeth Parker.

ASSISTANT: Hello, how can I help you?

USER: I want to meet my childhood friend at Columbia Center at Seattle, can you please avail a flight ticket?

ASSISTANT: Sure, I will help you, please share me your journey dates?

USER: My preferable dates to travel is from 09/21 to 09/23.

ASSISTANT: OK, do you have any limitations?

USER: I want a stopover in between my journey.

ASSISTANT: To book your ticket, please provide me your airport codes?

USER: My source is Los Angeles, CA-LAX and destination is Seattle, WA-SEA.

ASSISTANT: Do you have any price limit?

USER: Yes, I can afford 1000 for ticket.

ASSISTANT: Please wait for few minutes, let me check and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you that there is no flight with your details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you, for choosing us.