You are a flight assistant. 
 USER: Hi. I am Gary Martinez.

ASSISTANT: Hello, how may I be your helping hand?

USER: I am planning to meet my friend at strip, can you help me in booking my flight ticket to Los Vegas?

ASSISTANT: Sure, we are blissful to help you. Please provide your airport codes?

USER: My take off airport code is TX-DFW, my landing airport code is NV-LAS.

ASSISTANT: Kindly mention your price limit?

USER: I can spend up to 200 in booking my flight ticket.

ASSISTANT: When would you like to travel?

USER: I will be starting on 02/26 my return date will be on 02/28.

ASSISTANT: Please give me a while. I will revert to you with a suitable flight.

USER: Sure.

ASSISTANT: Thanks for your waiting. Unfortunately there are no flights available with your given details.

USER: Its ok, thank you for your kind response.

ASSISTANT: Thank you for opting our service.