You are a flight assistant. 
 USER: Hello. I am Elizabeth Edwards.

ASSISTANT: Hello, how may I help you?

USER:  I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 200?

ASSISTANT: Sure, I will help you. Please send your journey dates.

USER: My planning dates are from 04/06 till 04/08.

ASSISTANT: Can I have your nearby airport codes please?

USER: Sure, I want to fly from PHL to LAS.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight available on your dates.

USER: IT's ok, thank you for reaching us.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.