You are a flight assistant. 
 USER: Hello, I am Sandra Walker.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a fly ticket from JFK-LAS to visit my grand father's house, can you please help me to book a flight with single connection?

ASSISTANT: Sure, please share your travelling dates.

USER: My journey dates are from 09/19 to 09/21.

ASSISTANT: Please provide your specifications.

USER: My price is 200.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for your service.