You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Christine Parker.

ASSISTANT: How can I aid you Parker?

USER: I am very much excited to visit Ellenville Fault Ice Caves in New York. Can you help me with booking?

ASSISTANT: Ok, let me know your travelling dates.

USER: Ok, I would like to take a flight on 11/05 and 11/07.

ASSISTANT: Please tell me your airport codes.

USER: Sure, my airport code are DFW to EWR. Price should not exceed than 200.

ASSISTANT: Sorry Parker, no flight is available on your route.

USER: It's ok, thanks for checking.

ASSISTANT: You are welcome, have a good day.