You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Nicole Harris, can you help me to book a flight from CLT to EWR?

ASSISTANT: Ok, may I know your trip dates to go?

USER: My travelling dates are May 05 and 07.

ASSISTANT: May I know your price limit?

USER: My price limit is 200.

ASSISTANT: Sorry, there is no flight for you with your preferences.

USER: No problem, thanks for checking.

ASSISTANT: Welcome Nicole Harris.