You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas White.

ASSISTANT: May I know how best I can help you today?

USER: I want to book a flight ticket to attend a cultural fest at TX-DFW from NV-LAS.

ASSISTANT: Sure, Kindly share your fare preference.

USER: 200 is my price.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your planned travelling dates?

USER: 12/31 and 01/02 are my travelling dates.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we are unable to provide flight in between your journey routes due to runway up gradation.

USER: No issue. Thank you for your response.

ASSISTANT: You're welcome. Have a nice day.