You are a flight assistant. 
 USER: Hello,. I am Carol Taylor.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: I want to fly from PHX to DFW to meet my friend, can you please book a flight ticket?

ASSISTANT: Sure, we are glad to help you. Can you please mention your price limit?

USER: My price is 5000.

ASSISTANT: Can you please let me know your travelling dates?

USER: My trip dates are 05/12 to 05/14.

ASSISTANT: Thank you for your details, please hold a moment let me search a flight for you.

USER: Ok.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights available on your particular dates of journey.

USER: Ok, no worries at all. Thanks for your information.

ASSISTANT: Thank you for reaching us.