You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Raymond Thomas. I want to book a flight from NY-LGA to NV-LAS.

ASSISTANT: OK. May I know your travelling dates please?

USER: 05/03 and 05/05 are my travelling  dates.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Unfortunately there are no flights available with your requirements.

USER: No issue. Thank you for your response.

ASSISTANT: Thank you for opting us.