You are a flight assistant. 
 USER: Hello. I am Brian Turner.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket under the price of 5000. Can you help me in booking a flight ticket with a connecting flight?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are from 04/26 to 04/28.

ASSISTANT: To confirm your booking, provide me your airport codes?

USER: My airport cods are from DEN to LAS.

ASSISTANT: Please wait for few minutes.

USER: Sure.

ASSISTANT: Sorry, there is no flight with your requirement.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for reaching us.